At least 14 sailors aboard the USS Theodore Roosevelt who had recovered from COVID-19 have tested positive for a second time, raising questions about immunity and whether people can catch the coronavirus shortly after getting better.
"It's possible that people could shed remnants of the virus for some period of time. That doesn't mean anything is wrong with them or that they are contagious," said Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center in Nashville.bolsters that idea. Researchers at the Korean Centers for Disease Control and Prevention analyzed data on 285 COVID-19 patients who also tested positive after having appeared to recover.
"What we're finding more and more is that the fragments of virus that are being picked up on these swabs weeks later are not able to replicate," said Dr. Ania Wajnberg, associate director of medicine at the Icahn School of Medicine at Mount Sinai in New York City."They're not live virus."Still, the world has known about COVID-19 only for mere months, giving scientists no indication yet of how the virus acts long term.
The group has enrolled 15,000 volunteers, some of whom have had COVID-19 and others who haven't. Each day, the volunteers are asked to record any possible symptoms they're experiencing. If a person reports any kind of symptom, such as fever or a cough, researchers ask for more information. The research team will upload the results into a database, tracking symptoms in real time. Ideally, public health officials could then compare the information with electronic health records. Sanders said the project aims to tease out whether an uptick in cough, for example, correlates with a true rise in COVID-19 or simply with allergy season.
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