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Weird, not impossible. First confirmed case of reinfection by coronavirus in Brazil. A 37-year-old doctor, residing in the state of Rio Grande do Norte, was infected for the first time in June 2020 and the second in October 2020. This was reported by the Brazilian Ministry of Health. Genetic sequencing confirmed that the woman was infected with two different strains of the virus.
The Brazilian infected twice by Sars-CoV-2
What do we know at this time about the possibility of getting infected twice? Re-infection would be a very rare occurrence. the director of prevention of the Italian Ministry of Health, Gianni rezza, had reported the reports of several cases of reinfection, explaining: “But they are sporadic, it is a phenomenon that exists but seems very rare. The fact is that the initial studies had shown a decrease in antibody levels over time and a tendency to negativization, other subsequent studies have shown instead that the antibodies resist over time. There are no definitive observations, but there appears to be an antibody response. “
Coronavirus: is reinfection possible?
In people who have had a less severe form of Covid, the level of antibodies produced by the immune system to fight the virus is cut in half within a month of recovery. This rapid decline in antibodies needs to be confirmed by larger and longer-term studies, already underway at the European Institute of Oncology (Ieo) in Milan, but currently suggests that people who have already contracted the virus should not reduce your guard, but continue, like everyone else, to take steps to reduce individual risk of infection. These are the results of a pilot study carried out by the Covid Ieo Laboratory team, led by researchers Federica Facciotti, Marina Mapelli and Sebastiano Pasqualato, just published a few weeks ago in the Journal of Clinical Medicine. The results of the study, in addition to recommending care even for those who have already had the virus, also suggest that the serological test cannot be used to issue the hypothetical ‘immunity license’, but is effective as a systematic monitoring system to identify and stop new root shoots.
Cases of “second infection” have been reported several times in recent months, the fact that they are often paucisymptomatic is good news, according to the immunologist. Akiko Iwasaki: “This is a textbook example of how the immune response should work.” For Iwasaki, who studied immune responses to the SARS-CoV-2 virus at Yale University, the recent case of reinfection in Hong Kong was encouraging because the second infection caused no actual symptoms, suggesting that the man recalled the encounter. earlier with the virus, taking action and defending against the new infection before it did much damage.
We still don’t know everything about the virus. It was December 31 when the Chinese health authorities reported an outbreak of pneumonia cases of unknown etiology in the city of Wuhan. On January 9, 2020, the CDC of China (the China Center for Disease Control and Prevention) identified the new coronavirus (provisionally called 2019-nCoV) as the etiological cause of these pathologies. Not a year has passed, and to have any certainty of how long immunity lasts and the possibility of reinfection takes time, study, research.
