A Nevada man contracted coronavirus on two separate occasions with the second infection reportedly “more severe” than the first, according to a study published Monday.
The 25-year-old man is the first patient in North America to have tested positive twice, according to the Lancet study conducted under an emergency order from Nevada’s chief medical officer. The man’s two positive tests were separated by multiple negative tests and scientific analyses showed the virus was “genetically distinct” each time he tested positive.
“Previous exposure to SARS-CoV-2 does not necessarily translate to guaranteed total immunity,” the study said. “The implications of reinfections could be relevant for vaccine development and application.”
The man tested positive in April, tested negative twice in may and tested positive twice in June, according to the study. The study declined to make any conclusion on the man’s degree or period of immunity. (RELATED: ‘Dying In A Leadership Vacuum’: New England Journal Of Medicine Slams US Coronavirus Response)
The study also did not conclude why the man’s symptoms worsened. Rather, it said that the worse symptoms might have been a result of a higher dose of the virus or a different strain of the virus.