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1. Omai Garner, associate clinical professor and director of clinical microbiology at UCLA Health, told the " Today " show that the line shows the presence of "targeted viral proteins.". These antigen tests are not designed to give you an estimate of, Is there a lot of virus or is there a little virus? Volk explained. However, the CDC notes that people who've had COVID-19 may continue to test positive on PCR tests for up to 90 days, so it may be difficult to use a PCR test to diagnose a new coronavirus infection. Keep in mind, though, that there are other possible symptoms of COVID-19. All rights reserved. Coronavirus FAQ: Does a faint line on a self-test mean I'm barely You can change your choices at any time by clicking on the 'Privacy dashboard' links on our sites and apps. Then you test again the next day, and that positive line seems to be even more faint than it was on day 5. But these tests werent really designed to measure any of that, the experts said. Two lines means I do have Covid. Interpreting Results Check for Positive COVID-19 Result. But when I came back to check the test an hour later a positive line had appeared! A faint line could mean you've collected less virus this time around. A bartender has taken to TikTok to complain about customers constantly ask for 'no ice' in their drink - yet expecting to be served more alcohol. The incubation period for Covid is any from 2-14 days and differs from one person to the next. Try to take the test as close to the start time of the event as you can in order to get the most accurate results possible, the CDC advises. . A warning has been given by a doctor over faint lines appearing on lateral flow tests. Yes. "The faintness or darkness of the line probably has some correlation to degree of infectiousness especially early on [during the infection]," says Karan. In a couple of hours it can go from very faint to very, very bold and so in both those cases you probably have enough virus to spread that on. What does a faint line on a lateral flow Covid test mean? What does it mean when you have two lines on an antigen test and the one indicating COVID is very faint? What does a faint line on a lateral flow test mean? What counts as a