The report comes several days after the first confirmed coronavirus reinfection in the world was identified in Hong Kong.
A Nevada man appears to be the nation's first confirmed case of COVID-19 reinfection, researchers say.
It's still unclear why the patient was reinfected. The cause could lie in his immune system, the virus itself, or a combination of the two. "The evidence so far suggests that if you've been infected and recovered, then you're protected for some period of time," Dr. Ashish Jha, director of the Harvard Global Health Institute, said."We don't know how long, and we're going to find individual cases of people for whom that's not true."
Story continues"You'd expect the second time around people to have much milder or ideally no symptoms," Jha said. That's because the immune system should be able to mount a more robust response, and the Hong Kong case was"completely consistent with that."In the Nevada case, however, the man got sicker the second time. When he was first infected, he had typical symptoms for the coronavirus: headache, cough, sore throat, nausea and diarrhea.
"That's very concerning," Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center in Nashville, said.
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