A young Nevada man has been confirmed to be twice infected with the coronavirus, the first confirmed reinfection case in the United States, and the fourth in the world.
For the past week, researchers have Hong Kong patient And two patients in Europe; but in all three cases, patients either developed a milder form of COVID-19 or were asymptomatic a second time, NBC News..
However, according to a new case study, a 25-year-old Nevada patient developed more severe symptoms when they were infected a second time. That case was announced As a preprint for social science research networks (SSRN) And hasn’t been peer reviewed yet. Researchers have submitted their paper to the journal The Lancet Infectious Diseases.
Relation: Coronavirus Live Update
“It’s important to note that this is a unique finding,” said Mark Pandri, co-author of the study, who is the director of the Nevada Institute of Public Health. Said in a statement.. “No information is provided regarding the generalizability of this phenomenon.”
At the age of 25, he was first COVID-19 positive in mid-April after development Typical symptoms of the disease, Headache, cough, sore throat, nausea, diarrhea etc. His condition resolved within 10 days and was then tested twice for the virus.
However, at the end of May, the patient again developed fever, headache, dizziness, cough, nausea and diarrhea. Within a week, his blood oxygen level dropped and he was hospitalized where he received oxygen support. Finally, 48 days after being initially positive for coronavirus, he was positive again.
The researchers analyzed the coronavirus genome from both times he was infected and found that the virus differed in some of those genes caused by natural mutations. The findings strongly suggest that patients were infected twice with two slightly different versions of coronavirus rather than long-term infection with a single virus.
This may indicate that the initial exposure to the virus did not result in 100% protective immunity, the authors write in a study. But “it is important to note that the frequency of such phenomena is not defined in a single case study,” they wrote. “This may represent a rare event.”
The authors find it difficult to even find these cases in the United States and elsewhere because of the lack of comprehensive sequencing of the coronavirus genome from all positively tested individuals.
“If reinfection is possible in such a short timeline, it may affect the effectiveness of vaccines developed to fight the disease. It may also affect herd immunity. Pandri said in a statement. “We don’t know how much immunity builds up after recovery from COVID-19, how long the immunity lasts, or how much the antibodies play in protecting against reinfection.”
Originally published in Live Science.
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