AGI – A 25-year-old resident of Washoe County in the US state of Nevada, was infected twice by the Coronavirus. It is the first case of a person infected more than once in the United States, according to a study published in the medical journal Lancet. The news is important because it signals that those who contract Covid-19 do not automatically become immune.
The patient, according to the study published in the English scientific medical journal, was subjected to two positive tests for SARS-CoV-2, the first on April 18 and the second on June 5, in May two tests were instead results negatives. Genomic analysis of SARS-CoV-2 showed genetically significant differences between each variant associated with each case of infection. The second infection was symptomatically more severe than the first.
The genetic discrepancy of the two samples was greater than what could be explained by a short-term evolution, the experts explain. These results suggest that the patient was infected on two separate occasions from a genetically distinct virus. “Therefore, previous exposure to SARS-CoV-2 may not guarantee total immunity in all cases. All individuals, with or without a prior diagnosis of COVID-19, should take the same precautions to avoid infection, “they add. The implications of reinfection could be relevant to vaccine development and application.