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The protection conferred by having passed Covid-19 lasts, as a rule, up to 7 months in children. A team from the University of Texas Health Houston (USA) analyzed data from 218 children across the state of Texas between the ages of 5 and 19 who were enrolled in the Texas CARES survey, which began in October 2020 The goal was to assess Covid-19 antibody status over time among a population of adults and children in Texas. The study was published in “Pediatrics.”
Volunteers who signed up for the study provided researchers with three separate blood draws. Samples were collected before vaccination but also during waves of variants. Delta and Omicron. To date, the researchers have completed three different phases of the study.
“This is the first Texas CARES survey study to include data from all three survey time points,” says Sarah Messiah, author and professor at UTHealth. “The findings are important because the information we collected from children infected with Covid-19 did not differ at all whether a child was asymptomatic, the severity of symptoms, when they had the virus, whether they were a healthy weight or obese, or why they were infected. gender. They were the same for everyone.”
The data showed that while 96% of people infected with Covid-19 maintained antibodies until seven months later, more than half (58%) of the sample was negative for infection-induced antibodies in its third and last measurement. Results do not include the impact of vaccine protection.
“Studies in adults show us that natural infection, plus vaccine-induced protection, is the best defense against Covid-19. There has been a misunderstanding on the part of some parents who think that just because their child has had Covid-19, they are now protected and do not need to be vaccinated. While our study is encouraging because a certain amount of natural antibodies last at least six months in children, we still don’t know the absolute threshold of protection. The vaccine it’s a great tool to protect children,” concludes Messiah.
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