|According to the study, patients who were asymptomatic or who had mild symptoms at a first infection, may develop the severe form of the disease if they are infected again. Photo: AFP / SILVIO AVILA|
A study by the Oswaldo Cruz Foundation (Fiocruz), which has not yet been published, points out that a second Covid-19 infection may be more serious than the first time. The research also says that this does not depend on the variants that are in circulation.
The research, which was carried out in partnership with the Federal University of Rio de Janeiro (UFRJ) and Instituto D’Or de Ensino e Pesquisa (Idor), analyzed cases of reinfection that occurred in Rio de Janeiro between May and December 2020. The The result showed that the patients had more severe symptoms in the second occurrence even though they were not infected by the variants.
“Our discovery that people with mild Covid-19 may have controlled replication of Sars-Cov-2 without developing detectable humoral immunity * suggests that reinfection is more frequent than is supposed, but that hypothesis is not well documented,” he says. the study.
Not only can mutations cause reinfection
The data obtained in the study deny that only mutations could cause reinfections. Therefore, the researchers reinforce the warning about the need to maintain measures to contain the disease.
Another study by Fiocruz, published in January, already warned of the false sense of protection that the asymptomatic infection could bring. According to the research, in these cases the organism does not create an immunological memory after the first infection.
* Subdivision of acquired immunity where the immune response is carried out by antibodies.
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