• By The Financial District


A 25-year-old Nevada man appears to be the first documented case of COVID-19 reinfection in the United States, researchers say.

Genetic tests indicate the patient was infected with two different varieties of the virus, the team at the University of Nevada Reno School of Medicine and the Nevada State Public Health Laboratory reported, according to KCRA3 News.

The patient was first diagnosed with coronavirus in April after he had a sore throat, cough, headache, nausea and diarrhea, the researchers wrote in a pre-print study posted Thursday. He got better around April 27, and he tested negative for the virus twice afterwards.

He continued to feel well for about a month. Then on May 31 he sought care for fever, headache, dizziness, cough, nausea and diarrhea. Five days later, he was hospitalized and required ongoing oxygen support. He was tested again for COVID-19 and the results were positive.

The Nevada researchers examined genetic material from both coronavirus specimens collected from the man. Their analysis suggests he had two distinct viral infections.

The pre-print study has not yet been peer-reviewed by a journal, but the researchers noted that the findings suggest humans can catch COVID-19 multiple times.

It's not the first case documented globally.