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In the second episode of SARS-CoV-2 infection, the Nevada patient, currently recovered from Covid-19, had low blood oxygen level, with difficulty breathing.
From a new case of double infection by SARS-CoV-2, new details emerge about the duration of protective immunity against the new coronavirus. A 25-year-old from Nevada, as reported in an article in The Lancet (taken from the BBC), fell ill with Covid-19 twice in a few months, and the second time with more severe symptoms. In the second episode of SARS-CoV-2 infection, the patient, currently recovered from Covid-19, had a low oxygen content in the blood (hypoxia), with dyspnea, a condition that forced him to be hospitalized.
Although cases of double infection are particularly rare, the case of this American boy also suggests caution to those recovered from the disease and underscores the importance of anti-contagion measures.
The American Patient Case in Detail
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The young American, who had no health problems or immune defects that made him particularly vulnerable to Covid-19, showed the first symptoms of the disease (sore throat, cough, headache, nausea and diarrhea) on March 25. and tested positive for hyssop on April 18.
On April 27, she had no further symptoms and, the following month, she tested negative on two swabs (May 9 and May 26). However, the symptoms of Covid-19 reappeared on May 28: fever, headache, dizziness, cough, nausea and diarrhea. A swab performed on June 5 confirmed the positivity of the coronavirus, initially (mistakenly) related to a recurrence of the first infection.
A subsequent comparison of the genetic codes of the virus collected on the two occasions in which the patient had symptoms of the disease revealed that they were too different to be caused by the same infection. “Our results indicate that a contagion does not necessarily protect against future infections,” explained Dr. Mark Pandori of the University of Nevada. Cases of double infection have already been documented in Hong Kong, Belgium and the Netherlands, but only in this case was the reinfection more severe. “It is too early to say with certainty what the implications of these findings are for any immunization program. But they confirm the fact that we still do not know enough about the immune response to this virus,” another researcher concluded.
