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Previous COVID-19 infection reduces chances of reinfection for 10 months, finds Lancet study

Researchers from the University College London (UCL) analysed the data of infection from October last year with those of February this year in various care home residents and staff in England to arrive at the conclusion.

COVID-19 India - Xinhua
A child wearing a COVID19/coronavirus protective mask in front of a mural (Source: Xinhua)

New Delhi: A study published in the Lancet Healthy Longevity journal claims that a COVID recovered person has low chances of getting reinforced for the next 10 months. Researchers from the University College London (UCL) analysed the data of infection from October last year with those of February this year in various care home residents and staff in England to arrive at the conclusion.

In the research, it was found that COVID recovered persons who were residents had an 85 per cent less chance of getting reinfected.

Meanwhile, those working as staff had 60 per cent chance of getting reinfected.

“It’s really good news that natural infection protects against reinfection in this time period. The risk of being infected twice appears to be very low,” said study lead author Maria Krutikov, from UCL Institute of Health Informatics.

“The fact that prior COVID-19 infection gives a high level of protection to care home residents is also reassuring, given past concerns that these individuals might have less robust immune responses associated with increasing age,” Krutikov said.

The researchers picked 682 residents, with a median age of 86, and 1,429 staff in 100 care homes for the antibodies test with one-third of them testing positive which shows previous infections.

They then took the next sample after 90 days for RT-PCR testing to ensure that it didn’t flag the previous infection.

Out of the 634 people who have been previously infected only four residents and 10 staff members were re-infected.

Meanwhile, out of the 1,477 participants who had no history of being infected p3 residents and 111 staff tested positive in RT-PCR tests.

“This was a unique opportunity to look at the protective effect of natural infection in this cohort ahead of the roll-out of vaccination,” said senior study author Laura Shallcross, from UCL Institute of Health Informatics.

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The report said,”In summary, the risk of a SARS-CoV-2 reinfection was substantially reduced in staff and residents of LTCFs who were SARS-CoV-2 antibody-positive and the observed reinfections were not clinically severe.”

With inputs from PTI

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