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    With COVID on the rise, your at-home test may be taking longer to show a positive result

    LOS ANGELES -- With COVID-19 rising this winter, it's getting more complicated to discern whether you are infected. Dr. Elizabeth Hudson, regional chief of infectious diseases at Kaiser Permanente Southern California, said she has noticed it's sometimes taking longer after the onset of symptoms for rapid tests to return a positive result. It used to be that someone might test positive for the ...
    by Rong-Gong Lin II, Los Angeles Times Jan 10, 2024 4 minutes
    A single at-home COVID-19 test by Quidel sits on a drugstore shelf on Sept. 14, 2021, in Chicago, Illinois.

    LOS ANGELES -- With COVID-19 rising this winter, it's getting more complicated to discern whether you are infected.

    Dr. Elizabeth Hudson, regional chief of infectious diseases at Kaiser Permanente Southern California, said she has noticed it's sometimes taking longer after the onset of symptoms for rapid tests to return a positive result.

    It used to be that someone might test positive for the coronavirus one or two days after the onset of symptoms using a rapid test, Hudson said. Now, positive results might not show up until the fourth day after symptoms start.

    What is causing the lag?

    The delay in accurate test results is probably a result of people having from COVID-19 over the years, whether from vaccinations or previous infections,

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