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    Omicron can make you contagious before you test positive, allowing for rapid spread

    LOS ANGELES — Ahead of Christmas, health experts suggested undergoing a rapid coronavirus test just before any gatherings. But some health experts are now warning that you can test negative even if you’re infected and contagious while still being visibly healthy. In general, tests are able to reveal an omicron infection, but enough virus needs to have reproduced and appear at sufficiently high ...
    by Rong-Gong Lin II and Luke Money, Los Angeles Times Jan 11, 2022 4 minutes

    LOS ANGELES — Ahead of Christmas, health experts suggested undergoing a rapid coronavirus test just before any gatherings.

    But some health experts are now warning that you can test negative even if you’re infected and contagious while still being visibly healthy.

    In general, tests are able to reveal an omicron infection, but enough virus needs to have reproduced and appear at sufficiently high levels in the nose or saliva to be detectable, according to Dr. Michael Mina, an epidemiologist and former professor at the Harvard T.H. Chan School of Public Health, whose interview on the podcast “In the Bubble,” hosted by former White House COVID-19 adviser Andy Slavitt, published this week.

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