Nearly three years into the COVID-19 pandemic, the virus is still evolving. Now we're learning just how much immunity people are getting after being infected with COVID.
-- For at least 10 months after a COVID-19 infection, your immune system can provide good protection against symptomatic illness the next time around, a new study found, and the risk of severe illness is even lower.
"There's quite a long sustained protection against severe disease and death, almost 90% at 10 months. It is much better than I had expected, and that's a good thing for the world, right? Given that most of the world has had Omicron," said Dr. Chris Murray, director of the Institute for Health Metrics and Evaluation at the University of Washington."It means there's an awful lot of immunity out there."The U.S.
Generally, protection from infection seems to be at least equal to two doses of mRNA vaccine, at least for the variants through BA.1. The study didn't include an analysis of protection against XBB and the variants that followed. XBB.1.5 is causing about 75% of current cases, according to the CDC.More research will be needed to find out about those later variants, but Murray believes that protection should be about the same.
There's also the risk of having symptoms that last a long time, called long COVID. Research has found that a more severe illness means a higher chance of long COVID."We never know what we're setting people up for by going out and getting a disease," said Dr. Claudia Hoyen, an infectious disease specialist and director of pediatric infection control at UH Rainbow Babies and Children's Hospital in Cleveland, who was not involved in the new study.
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