A Nevada man is said to be the first person in the United States to catch COVID-19 twice, with the second infection worse than the first.
The man, whose name was not released, is 25 years old.
He tested positive April 18, with symptoms disappearing April 27.
Two tests, conducted on May 9 and May 26, both came back negative, but on May 28, symptoms of the coronavirus came back bringing a fever, dizziness and nausea.
On June 5, he tested positive a second time and also had shortness of breath and low blood oxygen.
The man has recovered, USA Today reported.
Doctors said the strains were genetically different so it wasn’t just a resurgence of his first illness. It was two separate infections.
“Our findings signal that a previous infection may not necessarily protect against future infection,” Dr. Mark Pandori told BBC News.
“It is important to note this is a singular finding and does not provide generalizability of this phenomenon,” Pandori said, according to the Huffington Post.
He said more research is needed, but added that patients who have recovered should still abide by guidelines of wearing face masks, washing hands and practicing social distancing since the case, and others like it, show there is a potential of reinfection, BBC News reported.
There have been at least 22 other cases of reinfection worldwide, USA Today reported.
For some perspective, there have been more than 37 million cases with 1 million deaths worldwide, according to Johns Hopkins data.
Click here to read the report on Lancet.
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