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Asymptomatic people are more likely to lose antibodies quickly than those who have had symptoms of the new coronavirus, shows a British study from Imperial College London and Ipsos Mori published on Tuesday.
From June 20 to September 28, they followed 350,000 people chosen at random in England, who regularly self-tested at home to see if they had COVID-19 antibodies.
“During this period, the proportion of people who tested positive for covid-19 antibodies decreased by 26.5%,” going from 6% to 4.4% of the population studied, explains a statement, “which suggests a reduction in antibodies in the weeks or months after infection.”
“The results also suggest that people who did not have symptoms of COVID-19 are likely to lose their detectable antibodies faster than those who did show symptoms,” the study adds.
The proportion of antibodies in people who tested positive for the virus it decreased by 22.3% over the three months.
The study highlights that, although all ages are affected by this decrease, the elderly suffer more: between June and September, the portion of people older than 75 years with antibodies it decreased by 39%, while it fell by 14.9% in the 18-24 age group.
“This study is a crucial element of the research, as it helps us understand how COVID-19 antibodies evolve over time,” said Health Secretary James Bethell.
However, “it is not yet known whether the antibodies confer an effective level of immunity or, if this immunity exists, how long it lasts,” specified Imperial College London and Ipsos Mori, who urged the British to follow health recommendations .
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