(Bloomberg) – U.S. In the first study to investigate the case of a person who was found to be infected with Covid-19 twice or re-infected, it can happen faster and the disease can be more serious.
Bloomberg
A medical worker wearing Personal Protective Devices (PPE) conducted a rapid Covid-19 test on Monday, October 12, 2020 in Auckland, California, USA. Auckland International Airport last week began offering free, quick-result Covid-19 test programs, first for airport staff and finally for the general public.
The research, published in the Lancet Medical Journal, looked at the case of a 25-year-old man living in Nevada who was infected with two different genetic variants of the SARS-CV-2 virus in less than two months. He tested negative twice in between, meaning he was not likely to have been infected for a long time.
US President Donald Trump has said he is free of the virus after a single encounter. Any new findings on resistance can also have an impact for the vaccine as drug manufacturers move toward the finish line.
The degree of protective immunity after Kovid-19 infection is a great unknown to the epidemic.
A handful of rehabilitation cases have been reported so far since the outbreak late last year. An Ecuadorian patient also suffered a second major illness, and an elderly woman in the Netherlands died after a second positive test. It is also possible that people with no symptoms can often become infected without knowing it.
The Nevada man tested positive for the virus in mid-April after experiencing headaches, coughs, ause bouts and diarrhea. She has no underlying condition that can make her illness worse. By the end of the month he was lonely and well.
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Oxygen is needed
In late May, however, the person sought advice at an immediate care center for fever and dizziness in addition to the symptoms he had experienced in the previous month. Five days later he was admitted to the hospital with shortness of breath and was given oxygen before testing positive once more for Covid-19.
The scientists sequenced the genomes of the patient’s virus samples and found significant differences, indicating that the man was infected by two different versions of the coronavirus.
The researchers said they could not confirm why the second infection was worse. It is possible that the patient was exposed to a higher dose of the virus a second time, that the version he experienced was more viral, or that the first infection was to blame the presence of antibodies in a twist observed with a second coronavirus. It is also possible – but unlikely – that there was a constant infection with some kind of deactivation-reactivation dynamic, they wrote.
“There are still a lot of strangers,” said Mark Pandori, director of the Nevada State Public Health Laboratory and lead author of the study. “Our findings indicate that previous SARS-CoV-2 infections do not necessarily protect against future infections. For our understanding of Covid-19 immunity, especially in the absence of an effective vaccine, the possibility of recurrence can have significant effects. “
(Updates with the death of a Dutch woman in the fifth paragraph)
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