American scientists have recorded the first case of re-infection with coronavirus in the United States, according to an article in the Lancet.
Scientists believe that this fact indicates that immunity to coronavirus may quickly disappear or not form at all.
They came to this conclusion by studying the medical history of a 25-year-old resident of the state of Nevada.
In late March and early April, he contracted the coronavirus, but suffered a relatively mild illness.
However, at the end of May, the man again felt unwell and went to the hospital. His coronavirus test came back positive. At the same time, re-infection led to the development of a more severe form of COVID-19.
Scientists have decoded the genomes of the patient's April and May virus samples and compared them with each other. The study confirmed that the young man contracted different versions of the coronavirus each time.
The article says that four more similar cases were identified in Ecuador, Belgium, the Netherlands and Hong Kong.
However, only one of them showed an increase in the symptoms of the disease. This fact does not yet allow us to say that repeated infections with coronavirus infection will always be more dangerous for humans.
Earlier it became known that the Netherlands registered the world's first death of a person after re-infection with coronavirus.