STUDY CLAIMS THAT COVID-19 ANTIBODIES LAST 9 MONTHS AFTER INFECTION

  • 19/07/2021

The antibody levels against the novel coronavirus (SARS-CoV-2 virus) remains at high levels for at least nine months, whether symptomatic or asymptomatic infections, based on the data analysed from an Italian town.
'Researchers from the University of Padua and Imperial College London tested more than 85 per cent of the 3,000 residents of Vo', Italy, in February/March 2020 for infection with SARS-CoV-2, the virus that causes COVID-19, and tested them again in May and November 2020 for antibodies against the virus,' the Imperial College London said in its website on Monday.
The study was published in the journal Nature Communications, an open-access journal, on Monday. As per the team's findings, 98.8 per cent of the residents that were found Covid-19 positive in February or March 2020 were found with detectable levels of antibodies in November 2020. The team used three assays, tests that detect antibodies that respond to different parts of the virus. 'The results showed that while all antibody types showed some decline between May and November, the rate of decay was different depending on the assay,' the Imperial College London said.

According to the team, the finding confirms that the majority of infections doesn't generate further infections and only a minority of the infections caused a large number of infections. It also showed that physical distancing, limiting the number of contacts and wearing face masks continue to remain important measures in reducing the risk of transmission even in highly vaccinated populations.
The data also showed that in the absence of case isolation and short lockdowns, manual contact tracing alone would not have been enough to suppress the pandemic, the Imperial College further said.

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