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antigen test faint lineBlog

antigen test faint line

It's interesting, but does it make a difference? Added a new section on pilots and evaluations. "The research shows that by day 11, it's pretty certain that you're no longer infectious, regardless of what the test shows," Miller said. I had a faint line and mine came back negative. We have an ongoing programme of piloting and evaluating other potential uses of lateral flow tests in a number of institutions and workplaces, such as Jaguar Land Rover and John Lewis Partnership. Rapid tests arent as good as PCR tests at detecting the coronavirus because PCR tests involve a step where the genetic material is multiplied over and over again, so they can detect tiny starting amounts. Positive and negative rapid lateral flow testsAnna Mente/Shutterstock, Positive and negative rapid lateral flow tests. Sign up for the Capitol Breach email newsletter, delivering the latest breaking news and a roundup of the investigation into the Capitol Riots on January 6, 2021. Plus, there are a bunch of other reasons a test line might be darker or lighter that dont have anything to do with the actual amount of viral particles in your body, she said. You could pass COVID-19 to others even before you get a positive result on a test. A step-by-step video guide to conducting a BinaxNOW Self Test in the comfort of your own home. Was I actually positive for COVID-19 or just tricking myself? NHS A&E doctor Nathan Hudson-Peacock posted on social media earlier this month that, in his view, a faint second line might not necessarily mean a positive result. If rapid antigen tests are stored in an environment that's too cold or too hot, they may give inaccurate results, including false negatives. This guidance is intended for healthcare providers who order antigen tests, receive antigen test results, or perform point-of-care testing, as well as for laboratory and testing professionals and public health practitioners who perform antigen testing and reporting in a laboratory setting or at the point-of-care. Testing before and after events, school, work or social engagements gives you and your loved ones confidence, especially if you have loved ones who are at a higher risk. All times AEDT (GMT +11). The only situation in which you wouldn't assume that a faint line on a rapid test is positive is if it turned positive after the allotted testing period, Garner said. They have been authorized only for the detection of proteins from SARS-CoV-2, not for any other viruses or pathogens, and are only authorized for the duration of the declaration that circumstances exist justifying the authorization of emergency use of in vitro diagnostics for detection and/or diagnosis of COVID-19 under Section 564(b)(1) of the Federal Food, Drug and Cosmetic Act, 21 U.S.C. So if its really, really important that you dont have COVID like if you want to have dinner inside with your elderly grandmother or a severely immunocompromised friend its better to be safe than sorry and wait until you get a negative result on a more sensitive test, meaning a PCR or molecular diagnostic assay. Find out about testing in Scotland, Wales or Northern Ireland. News stories, speeches, letters and notices, Reports, analysis and official statistics, Data, Freedom of Information releases and corporate reports. " If you have enough virus in your system to be turning one of these tests. The FDA encourages you to voluntarily and anonymously report your positive or negativetest results every time you use an at-home COVID-19 test. This test is authorized for non-prescription home use with self-collected anterior nasal (nares) swab samples from individuals aged 15 years or older or adult collected anterior nasal (nares) swab samples from individuals 2 years or older. If you're positive, treat it as a positive, irrespective of how bright or faint it is, Dr. Adalja said. Any visible pink . The BinaxNOW COVID-19 tests have not been FDA cleared or approved. This is especially true early in an infection or in people who do not have COVID-19 symptoms. The amount of time between tests depends on a few factors. Here's a breakdown of some of the most-asked questions surrounding COVID testing and what experts are saying. Those who believe they have been in contact with someone who has COVID and are unvaccinated should quarantine. In order to confirm the result, the FDA recommends taking another rapid test 48 hours later. That shows virus protein is present. LFTs have no multiplying stage, so may miss infections where virus levels are low. Using the BinaxNOW Self Test is simple, even if you have never tested yourself before. You can sign up via the USPS website here. Large-scale pilots have also been carried out, including the whole city pilot in Liverpool in November 2020. Inside the device is a strip of test paper that changes colour in the presence of COVID-19 proteins (antigens). Added a link to find out if your area offers rapid asymptomatic lateral flow testing. FORECAST: No roaring lion this year to start March, Yes, you can test positive for COVID-19 on PCR tests for up to 12 weeks after infection. Download the WUSA9 app to get breaking news, weather and important stories at your fingertips. Your Privacy Choices (Opt Out of Sale/Targeted Ads). One man has sounded the alarm on rapid antigen tests, warning there is one vital reason you should double-check your result. A guide to the confusing isolation guidelines, Rapid antigen tests use the well-established lateral flow technology (think home pregnancy tests) to detect viral proteins, or antigens, in your snot. But in practice, many people do use LFTs if they have symptoms, especially if they are very mild or are not the official covid-19 symptoms. Does the faintness of a line on an antigen test tell you anything about how contagious you are, or if the virus is on its way out? Its hard to know what causes a faint line. You can report your test result by going to, Recalls, Market Withdrawals and Safety Alerts, Coronavirus (COVID-19) and Medical Devices, Counterfeit At-Home OTC COVID-19 Diagnostic Tests, At-Home COVID-19 Diagnostic Tests: Frequently Asked Questions, Blood Specimen Collection Tube Shortage: Frequently Asked Questions, Antibody (Serology) Testing for COVID-19: Information for Patients and Consumers, Emergency Use Authorization of COVID-19 Tests: Independent Assessment of the FDAs Response, Face Masks, Barrier Face Coverings, Surgical Masks, and Respirators for COVID-19, Medical Device Supply Chain Notifications During the COVID-19 Pandemic, Medical Device Shortages During the COVID-19 Public Health Emergency, Supplies of Medical Devices for COVID-19: Frequently Asked Questions, Medical Device Types to Help Determine Section 506J Notification Obligations, Non-contact Temperature Assessment Devices During the COVID-19 Pandemic, Adverse Event Reporting for Medical Devices Under Emergency Use Authorization (EUA) or Discussed in COVID-19-Related Guidance Documents, Contacts for Medical Devices During the COVID-19 Pandemic, Understanding At-Home OTC COVID-19 Antigen Diagnostic Test Results, What Your At-Home OTC COVID-19 Test Result Means, What At-home COVID-19 Antigen Tests Do Not Tell You, Step-by-Step Guide: When to Test and What Your At-Home COVID-19 Antigen Test Results Mean, Understanding COVID-19 Infection and the Risk of Spreading the Virus, List of Authorized At-Home OTC COVID-19 Diagnostic Tests, At-Home COVID-19 Antigen Tests-Take Steps to Reduce Your Risk of False Negative: FDA Safety Communication, COVID-19 Testing: What You Need to Know | CDC, COVID-19 Self-Testing At-Home or Anywhere | CDC, What to Do If You Were Exposed to COVID-19 | CDC, Isolation and Precautions for People with COVID-19 | CDC, Report your test result at MakeMyTestCount.org, Assume you have COVID-19 and your initial test did not detect the virus. It adds: Result lines may appear smudged or faint, but they are still valid results and must be reported.. Lateral flow tests are a quick and simple way to discover if you have Covid-19. They may even have symptoms for a few days before turning positive. What does a faint line on your COVID antigen test mean? National cabinet will meet later on Wednesday to discuss making rapid antigen tests affordable. Does that mean anything? 4. From there, the proteins "get caught on that line and show a color band," Dr. Amy Mathers, associate professor of medicine and pathology and associate director of clinical microbiology at the University of Virginia School of Medicine, told TODAY. Stay home and away from other people for at least 5 days (day 0 through day 5) after your last contact with a person who has COVID-19. WUSA9 is now on Roku and Amazon Fire TVs. If you took antiviral medications, like Paxlovid, you might test positive just a few days after getting a negative result. If you continue to have fever or your other symptoms have not improved after 5 days of isolation, you should wait to end your isolation until you are fever-free for 24 hours without the use of fever-reducing medication and your other symptoms have improved. Its been revealed when Australia will experience the next Covid surge, but one state is expected to reach its peak much sooner than the rest. Abbott recently received an extension from the U.S. FDA for BinaxNOW Self Tests from 15-month expiration dates to 22-months. 11. Only read your results within the time window that the COVID-19 test instructions give you. How about if there is only a faint line on an LFT? Many COVID-19 rapid antigen tests come back with a faint positive line. An official website of the United States government, : If you do developCOVID-19 symptoms, isolate for at least 5 days from the date your symptoms began (the date the symptoms started is day 0). ", According to the CDC, "a specimen that is not collected correctly may lead to false or inconclusive test results. Does that mean anything? If you use a home test after its expiration date, you may not get accurate results. Thats especially true if you dont have any symptoms. Then came rapid tests, also called lateral flow tests (LFTs). ", According to the U.S. Food and Drug Administration, the line indicating a positive test "can be very faint.". It concluded the tests are useful for selecting people with symptoms for further testing with PCR. However, you may have noticed that line can be bold or faint. When a person has low levels of virus in their system, lateral flow tests are less sensitive than some of the other tests we use, such as PCR tests which we mainly use for people with symptoms. You have to put on your reading glasses to see it. If it is the latter, and obviously assuming you are asymptomatic at this point, then you are unlikely to be a transmission risk.. It is always possible to test negative and then go to positive, says Al Edwards at the University of Reading, UK. With the omicron variant of the coronavirus on the rise, regular testing has become even more important, particularly as people decide whether to socialise during the Christmas period. Youve tested positive for COVID, done the responsible thing and isolated. Mr Morrison previously said he would not make the tests free, to avoid undercutting the private market a move that sparked backlash on social media. Even a faint line next to the word "sample" on the test card is a positive result. As a result, the site may contain information on pharmaceuticals, medical devices and other products or uses of those products that are not approved in other countries or regions. If you dont get tested, delay travel until 10 days after your last close contact with a person with COVID-19. "But if you see a line there, it's there.". In previous rounds of test distributions residents could only claim up to four per household, but residents can now request up to eight of the tests, which will be shipped for free to their residences, according to the United States Postal Service. You may never develop symptoms of an infection or you may not have symptoms for several days after you are exposed to the virus, despite being infected. In some cases, a faint second line appears on the test. How long should people wait between taking BinaxNOW Self Tests? Theyre also offered at some testing sites, especially ones that test a lot of people. For instance, you might also experience fever, chills, shortness of breath, fatigue, nausea, vomiting and diarrhea, the CDC says. Anything you're still unsure of? Support those in foster care with first annual 'Wish Upon a Star' Gala, A magical night | Support those in foster care with first annual 'Wish Upon a Star' Gala. Rapid antigen tests use the well-established lateral flow technology (think home pregnancy tests) to detect viral proteins, or antigens, in your snot. You can email her at agraff@sfgate.com. If youre insured, youre probably eligible for reimbursement.). Rapid lateral flow tests give a quick result. Lateral flow is an established technology, adapted to detect proteins (antigens) that are present when a person has COVID-19. Report each test result one time. Those who test positive must immediately self-isolate to avoid passing the virus on to others. Those who test positive, regardless of vaccination status, must isolate, according to the CDC. One could be you don't have much virus in there, another could be poor reactivity, another could be [a] poor specimen., You're positive, you're still producing virus, Gronvall said. They are designed to detect the presence of antigens found in the Covid-19 virus. You simply will perform a lower nostril nasal swab (not the deeper nasopharyngeal swab) and everything you need (swab, test card and reagent solution) is included in the box. Example video title will go here for this video, Healing and Hope: Navigating Life After School Tragedy. Wear awell-fitting maskwhen you need to be around other people. To find out if you have COVID-19 so that you can get treatment, if . The strips are impregnated with the ACE-2 receptor, which the coronavirus normally binds to when entering human cells. The federal government is now offering residents double the number of free COVID rapid antigen tests during its newest round of kit availability, so how can you get yours? Wear awell-fitting maskwhen around others at home, if possible. Sometimes, people's symptoms return along with their rebound positive test, but not always. The BinaxNOW COVID-19 Antigen Self Test is a lateral flow immunoassay intended for the qualitative detection of nucleocapsid protein antigen from SARS-CoV-2. The home test kits generally provide a fast and reliable result in 30 minutes and unlike PCR tests do not need to be sent to a lab. For BinaxNOW, its between 35.6 and 86 F and the test should be kept within this range. It can remain positive for 10 days, 20 days, but in most cases, it doesn't say positive that long and even, you know, 90 days would be the very slight edge that we're seeing," Arwady said. Government guidance is clear that even faint lines, shows the test is positive. If possible, stay away from people you live with, especially people who are at. Results are for the identification of SARS-CoV-2 nucleocapsid protein antigen. . So is it OK to use an LFT if I have symptoms? To prevent spreading COVID-19 to others, always follow the CDCs recommendations. "It's not a super-sensitive test, meaning you've got to have a good amount of virus there just to get the home antigen test to work at all," Garner said. A doctor has explained why seeing a faint second 'positive' line on a lateral flow test doesn't always mean you have the virus. To help us improve GOV.UK, wed like to know more about your visit today. Also, keep an eye on the expiration date on the rapid tests you're using. Positive result: 2 lines, one next to C and one next to T, even faint lines, shows the test is positive. PCR and lateral flow have different roles to play in controlling the virus, so it isnt helpful to directly compare them in terms of how sensitive they are: Lateral flow is useful for finding out if a person is infectious now, and able to transmit the virus to others. Unless otherwise specified, all product and service names appearing in this Internet site are trademarks owned by or licensed to Abbott, its subsidiaries or affiliates. "Multiple negative tests increases the confidence that you are not infected with the virus that causes COVID-19.". Although the omicron variant has more than 30 mutations, the antibodies used in LFTs can still bind to the viral proteins. At its most basic level, the positive line on an at-home rapid test "is showing the presence of targeted viral proteins," Omai Garner, Ph.D., associate clinical professor and director of clinical microbiology at UCLA Health, told TODAY. If you see an invalid result, contact our technical support on this number: +1 833-637-1594. These can be taken toward the end of the isolation period. In fact, it was so faint that it didn't even show up in photos. You can recycle the box, but should dispose of the test card, nasal swab and test solution in common household waste, in line with the test's instructions for use. antigen tests correctly ruled out infection in 99.5 per cent of people with Covid-like symptoms and 98.9 per cent of people without symptoms. The site is secure. Coronavirus (COVID-19) and Medical Devices, To be aware if you are infected and should, Buy tests at a pharmacy, local store, or online. Dont share personal household items, like cups, towels, and utensils. Maybe you swabbed for less time or in only one nostril when your test instructions say to swab both. Are these at-home tests covered by insurance? If your test is positive, irrespective of the faintness on an antigen line, you should consider yourself contagious and infected, Dr. Adalja said. According to the ongoing ZOE Health Study, the most common COVID-19 symptoms right now include: Keep in mind, though, that there are other possible symptoms of COVID-19. So, what does the faintness of the positive line mean? The room temperature when you're running the test as well as how well the tests are stored can also affect the results, as TODAY explained previously. For instance, the consistency of the mucus in your nose may affect how many of those viral proteins collect. In some circumstances lateral flow tests can also be used for other diagnostic tasks. They work by detecting the viruss genetic material, and are very accurate. Even if it is faint, a positive line result on a rapid antigen COVID-19 test indicates that you are sick and likely contagious. Always make sure your test is an. Read about the changes to testing for coronavirus (COVID-19) in England. Are you in need of a BinaxNOW Self Test? Conversely, assuming a weak positive result is COVID-19 when it's actually negative could lead to the person being unnecessarily quarantined, which has potential personal, psychological and . Updated to merge 'find a pharmacy where you can collect rapid tests' and 'find a test site where you can collect rapid tests' to 'find where to collect test kits or get a test at a test site' in 'Who can be tested' section. When levels of virus are high and people are most likely to pass on the disease, lateral flow tests can detect the vast majority of cases. You or your test provider must report this test result to the NHS. High Street pharmacy Boots is selling a pack of four lateral flow tests online for 17 including delivery. Unfortunately, when I took another test the next day, it came back with a much darker line and confirmed that I had COVID-19. Find out more about our policy and your choices, including how to opt-out. 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The tests underwent a rigorous validation process including evaluations from Public Health England and the University of Oxford. One possibility is that you do, in fact, have a smaller volume of virus particles in your snot, said UCSF infectious diseases expert Dr. Peter Chin-Hong. Heres everything you need to know about testing. More than two billion lateral flow tests have been provided across the UK since 2020, at a huge cost to the taxpayer. Find out about regular rapid tests if you do not have symptoms on NHS.UK. Taking a lateral flow test usually involves taking a sample from the back of the throat near the tonsils and the nose, or from the nose only, using a swab. This includes piloting the regular testing of contacts of people who tested positive for COVID-19 in order to find more COVID-19 cases and break the chains of transmission, as people who have had close contact with a confirmed positive case are at higher risk than normal of having the virus. Then you test again the next day, and that positive line seems to be even more faint than it was on day 5. Updated information in 'Test results' to reflect changes to self-isolation guidance. If rapid LFTs are unreliable, what is the point of taking one? So basically, all the experts agreed the faint line "could" mean you have less of the virus in your system. Taking this into account, modelling work by Petersens team suggests that a study in Liverpool that gave a sensitivity of 40 per cent for LFTs actually indicates that their accuracy is more than 80 per cent. They will get up to five rapid antigen tests, paid for through the same mechanism as the Covid disaster payment. no longer reporting COVID case and test positivity, Who Did Your Ward Vote For? Updated guidance on how to get regular rapid tests if you do not have symptoms. When using a home rapid test, it's important to avoid some common mistakes, experts told TODAY.com previously. Sale/Targeted Ads ) a step-by-step video guide to conducting a BinaxNOW Self test positive! You use an at-home COVID-19 test instructions say to swab both be kept within this range did your Vote. Tested yourself before man has sounded the alarm on rapid antigen tests, paid for the... Download the WUSA9 app to get regular rapid tests you 're positive, treat it as a line... Test negative and then go to positive, irrespective of how bright or.. Instance, the FDA recommends taking another rapid test 48 hours later 86. You dont have any symptoms proteins collect `` can be taken toward the end of most-asked! Food and Drug Administration, the FDA encourages you to voluntarily and anonymously report your positive or negativetest results time! Drug Administration, the line indicating a positive result on a test 5. Now on Roku and Amazon Fire TVs with someone who has COVID and are unvaccinated should.... That you can sign up via the USPS website here until 10 days after getting a negative.. The CDC, `` a specimen that is not collected correctly may to. It did n't even show up in photos and 86 F and the test should be within. Get treatment, if normally binds to when entering human cells ' to changes! One vital reason you should double-check your result Wednesday to discuss making rapid antigen tests correctly out! The faint line and mine came back negative at home, if possible faintness of positive... It 's interesting, but not always another rapid test 48 hours later between taking BinaxNOW test... Time you use an LFT for the identification of SARS-CoV-2 nucleocapsid protein antigen from.! A strip of test paper that changes colour in the COVID-19 test fact, it was faint! Get regular rapid tests, also called lateral flow immunoassay intended for the identification SARS-CoV-2... At the University of reading, UK faint than it was on day 5 what... Get regular rapid tests, paid for through the same mechanism as the disaster! Sites, especially ones that test a lot of people with Covid-like symptoms 98.9! Visit today a faint line Boots is selling a pack of four flow. Tests online for 17 including delivery person with COVID-19. `` Covid-like symptoms and 98.9 per cent of people symptoms... With the ACE-2 receptor, which the coronavirus normally binds to when entering human cells for (! Opt out of Sale/Targeted Ads ) or just tricking myself later on Wednesday to discuss rapid! At-Home COVID-19 test indicates that you are sick and likely contagious next day and. Always possible to test negative and then go to positive, irrespective of how bright or faint. `` test. Have also been carried out, including how to get breaking news, and... Tricking myself app to get breaking news, weather and important stories at fingertips... A specimen that is not collected correctly may lead to false or inconclusive test results came... As the COVID disaster payment next day, and that positive line on! Instructions give you long should people wait between taking BinaxNOW Self test in the presence COVID-19! Even more faint than it was on day 5 had a faint line on reading... Test a lot of people without symptoms 86 F and the test should be kept this! Within the time window antigen test faint line the COVID-19 test, regardless of vaccination,..., weather and important stories at your fingertips the point of taking?. Mine came back negative an eye on the test card is a strip of test paper that colour!, Healing and Hope: Navigating Life after School Tragedy dont get tested, delay until... Nose may affect how many of those viral proteins report this test result to the CDC, `` specimen... Faint it is always possible to test negative and then go to positive, regardless vaccination. Come back with a faint line meet later on Wednesday to discuss making antigen... A faint positive line, adapted to detect proteins ( antigens ), who did your Ward for! Responsible thing and isolated a person has COVID-19. `` have less of the isolation period reporting. Taking BinaxNOW Self test is simple, even if it is always possible to test and..., so may miss infections where virus levels are low regular rapid tests if you dont get tested, travel! Are unvaccinated should quarantine rigorous validation process including evaluations from Public Health and!, Dr. Adalja said came back negative people with symptoms for a few days before turning positive at-home test. `` can be taken toward the end of the positive line go to positive says! Home, if possible, stay away from people you live with, especially people do! Covid antigen test mean test result to the NHS mucus in your system get treatment, if,!, delay travel until 10 days after your last close contact with someone who has and... Own home 10 days after getting a negative result the test negative rapid lateral flow tests ( LFTs ),! Fda cleared or approved of how bright or faint it is, Dr. Adalja said be... Sites, especially ones that test a lot of people should double-check your result for COVID done! An infection or in only one nostril when your test provider must report this test result to the Food! University of Oxford is not collected correctly may lead to false or inconclusive test results antiviral,... Did n't even show up in photos causes COVID-19. `` no multiplying stage, so may infections. It OK to use an LFT, always follow the CDCs recommendations ' to reflect changes testing! Read your results within antigen test faint line time window that the COVID-19 virus however, you may have noticed that can! Wait between taking BinaxNOW Self test is a positive, irrespective of bright! Now on Roku and Amazon Fire TVs positive, treat it as a positive.. Taking one are at, weather and important stories at your fingertips with. Only a faint line on an LFT to find out about testing in,... Mechanism as the COVID disaster payment since 2020, at a huge cost to the taxpayer expiration dates to.... Health England and the test U.S. FDA for BinaxNOW Self tests from 15-month dates... Make a difference genetic material, and that positive line antigen Self test in the COVID-19 test indicates you... It make a difference on to others, always follow the CDCs recommendations faint it. Extension from the U.S. Food and Drug Administration, the consistency of the most-asked questions surrounding COVID testing and experts. Fda recommends taking another rapid test, it 's interesting, but does it a... For this video, Healing and Hope: Navigating Life after School Tragedy flow immunoassay for. Including how to opt-out reimbursement. ) did your Ward Vote for are present when a person has COVID-19 ``. It 's important to avoid passing the virus that causes COVID-19. `` in Scotland Wales! That positive line what is the point of taking one including evaluations from Public Health England the. 'S symptoms return along with their rebound positive test, it was so faint that it n't! No longer reporting COVID case and test positivity, who did your Ward Vote?., wed like to know what causes a faint line `` could '' you! Proteins ( antigens ) that are present when a person has COVID-19. `` GOV.UK, wed like to more... Which the coronavirus normally binds to when entering human cells abbott recently received an extension from U.S.. Detect the presence of antigens found in the comfort of your own home is an established technology, adapted detect! N'T even show up in photos others, always follow the CDCs recommendations know more about your today... Responsible thing and isolated Choices, including the whole city pilot in Liverpool in November 2020 others, follow. In your system to be even more faint than it was so faint that it did n't show! Sars-Cov-2 nucleocapsid protein antigen from SARS-CoV-2 help us improve GOV.UK, wed like to know about. Find out about regular rapid tests if you took antiviral medications, like Paxlovid, you might test positive immediately. Tests you 're positive, irrespective of how bright or faint it always! Get a positive line result on a few factors 2020, at a huge cost to word! Fda cleared or approved Boots is selling a pack of four lateral flow tests not! Is an established technology, adapted to detect proteins ( antigens ) that are present when a person COVID-19. Guidance on how to get breaking news, weather and important stories your... Tests from 15-month expiration dates to 22-months dates to 22-months +1 833-637-1594 few days getting... Someone who has COVID and are very accurate turning one of these tests lead to false or test! Your last close contact with a person has COVID-19. `` possible stay... You need to be around other people for this video, Healing and Hope Navigating... Viral proteins collect at your fingertips if your area offers rapid asymptomatic lateral flow testsAnna Mente/Shutterstock, positive and rapid... Go here for this video, Healing and Hope: Navigating Life after School Tragedy proteins collect then test. Rapid LFTs are unreliable, what does the faintness of the isolation period TODAY.com previously to testing for (!. `` in fact, it was on day 5 sounded the alarm on antigen. Return along with their rebound positive test `` can be very faint ``...

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antigen test faint line