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Covid immunity lasts 13 months after infection, French study finds
The preliminary study found that 97% of subjects maintained antibodies for over one year after testing positive
People who catch the Covid-19 virus will retain antibodies for up to 13 months after infection and be 96.7% less likely to be reinfected, a new study supported by Strasbourg University Hospitals has found.
The study, published May 20, followed 1,309 people, of which 393 had already contracted Covid-19, for a period of over one year. Of the 393 people who had already had Covid-19, only one was reinfected.
This was a 23-year-old female medical student. She first developed Covid-19 with mild symptoms in March 2020, with a high viral load. She caught it again in January 2021 but was asymptomatic and had a low viral load.
The paper states:
“Altogether, our findings indicate that although anti-SARS-CoV-2 antibody titers do indeed decline, the risk of reinfection within a year post-infection remains low.”
The study found that antibodies remained effective long-term against the original strain of the virus, the UK variant and South African Variant. Other variants were not tested as part of the study.
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The paper has not yet been peer-reviewed.
Read more:
Covid herd immunity in France is ‘on track for end of summer’
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