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A study carried out in Catalonia on health personnel has concluded that one year after contracting covid-19, the vast majority of people maintain antibodies, regardless of the severity of the symptoms. In addition, the same study reveals that the immunity generated by vaccines is long-lasting .

Covid antibodies persist for up to 13 months after infection, study finds
During the first wave of the pandemic, the team from the Catalan Health Institute (ICS) and the Jordi Gol University Institute for Research in Primary Health Care Foundation (IDIAP JG) , in collaboration with Carlota Dobaño’s group at ISGlobal, began a follow-up study in 173 health workers infected with covid-19 , who worked in primary care centers in central Catalonia.

For the study, blood samples were taken regularly during the month of September to measure the level and type of antibodies against covid-19 in toilets , whose coronavirus infections were mostly mild and moderate.

Ana Ruiz Comellas , ICS researcher and co-author of the study, has assured that “the results obtained so far make us think that immunity to the SARS-CoV-2 virus is longer than we suspected at the beginning of the pandemic. The virus is so new, it is very important to be able to analyze behavior and its effects on people .

Overcoming covid-19 leaves antibodies even in the bones
Five months after infection, no significant drop in antibodies was observed, and at nine months, 92.4% of the health workers still had antibodies. In April of this year, people who had not yet been vaccinated a year after infection, had very similar results to the previous year.

“These data confirm the longer duration of IgG antibodies [the most abundant in the body], but surprisingly those of the IgM type [the first made by the body to fight a new infection], which normally last less, too they seem to last for quite some time, “said ISGlobal researcher and study co-author Gemma Moncunill .

The study has concluded that having been hospitalized, having developed a fever or having lost odor or smell is associated with higher levels of antibodies at five to nine months. ” They also confirm that people who have not been infected should be vaccinated as a priority , since people who have passed the infection maintain antibodies for at least a year,” said Anna Ramírez-Morros, the main author of the study.

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