Council of Scientific Industrial Research (CSIR), a research institute in India, has conducted a serosurvey in India to determine which blood groups are more vulnerable to the deadly <a href="https://www.wionews.com/topics/coronavirus">coronavirus</a>.

The pan-India analysis has revealed that people with blood group 'O' are less susceptible to COVID-19 and people with the blood groups 'B'&nbsp;and 'AB' are more vulnerable to the virus.

Also read |&nbsp;<a href="https://www.wionews.com/world/biontech-founder-confident-covid-vaccine-works-against-indian-variant-381076" hreflang="en">BioNTech founder 'confident' Covid vaccine works against Indian variant</a>

The blood group 'O' has been associated with a low positivity rate, as per the experts of CSIR, whereas 'AB' ranked highest in seropositivity, followed by the 'B' blood group.

This survey was conducted by a team of 140 doctors who assessed samples from nearly 10,427 adults from all over the country, who became subjects of this research voluntarily.

Also read |&nbsp;<a href="https://www.wionews.com/world/world-has-failed-india-amid-record-surge-in-covid-19-cases-says-top-us-disease-expert-fauci-381019" hreflang="en">World has failed India amid record surge in COVID-19 cases, says top US disease expert Fauci</a>

It has also been suggested in the research that smoking, which is labelled to be a deadly habit, might be acting as a line of defence as it helps increase mucous production. However, the researchers have also stressed that further study is needed into this matter and CSIR does not promote smoking in either case.

"Smoking is known to be severely detrimental to health and associated with multiple diseases and this observation should not be taken to be an endorsement, especially given that the association is not proved to be causal," the paper said.

The paper has also suggested that a vegetarian diet, which is rich in fiber, might also play an important role in providing immunity against the deadly virus.

Council of Scientific Industrial Research (CSIR), a research institute in India, has conducted a serosurvey in India to determine which blood groups are more vulnerable to the deadly coronavirus.

Council of Scientific Industrial Research (CSIR), a research institute in India, has conducted a serosurvey in India to determine which blood groups are more vulnerable to the deadly coronavirus. The pan-India analysis has revealed that people with blood group 'O' are less susceptible to COVID-19 and people with the blood groups 'B' and 'AB' are more vulnerable to the virus. Also read | BioNTech founder 'confident' Covid vaccine works against Indian variant The blood group 'O' has been associated with a low positivity rate, as per the experts of CSIR, whereas 'AB' ranked highest in seropositivity, followed by the 'B' blood group. This survey was conducted by a team of 140 doctors who assessed samples from nearly 10,427 adults from all over the country, who became subjects of this research voluntarily. Also read | World has failed India amid record surge in COVID-19 cases, says top US disease expert Fauci It has also been suggested in the research that smoking, which is labelled to be a deadly habit, might be acting as a line of defence as it helps increase mucous production. However, the researchers have also stressed that further study is needed into this matter and CSIR does not promote smoking in either case. "Smoking is known to be severely detrimental to health and associated with multiple diseases and this observation should not be taken to be an endorsement, especially given that the association is not proved to be causal," the paper said. The paper has also suggested that a vegetarian diet, which is rich in fiber, might also play an important role in providing immunity against the deadly virus.

People with 'O' blood group less vulnerable to COVID-19: Indian research body

A survey by the Council for Scientific and Industrial Research (CSIR) has suggested that the recurrence of coronavirus outbreak in March could have been due to lack of "meaningful antibodies" in seropositive people after a peak in September last year.

The CSIR conducted a sero-survey on 10,427 people comprising the staff members of its 40 laboratories, including contractual employees, and their family members from 17 states and two union territories.

In 10,427 people, the average seropositivity was 10.14 per cent.

The survey suggested that the neutralising antibodies declined significantly after five-six months, making people prone to reinfections.

The coronavirus cases in the country peaked in September 2020 and there was a nationwide decline of new cases starting in October, said Shantanu Sengupta, one of the lead authors of the paper.

"Our data shows that while anti-NC (nucleocapsid) antibodies provide long-lasting evidence of viral exposure or infection, about 20 per cent of seropositive individuals lack meaningful neutralisation activity after 5-6 months.

"Using more stringent measures (more than 30 per cent inhibition of surrogate receptor-spike protein binding), the loss of neutralisation maybe even higher.

We speculate that this may be related to the recurrence of outbreaks in March 2021 after the peak in September 2020," the paper said.

India is currently witnessing a massive surge in infections with logging a daily case count of over 3,00,000 on four consecutive days.

According to the paper, the aggregate sero-positivity of 10.

14 per cent in its multi-centre study suggests India had a large pool of recovered immune subjects by September 2020, especially amongst its high contact workers and people using public transport, leading to a decline in new infections.

"However, the duration of such immunity may not be sufficient to prevent future outbreaks, even in highly affected regions, the paper said.

States like Maharashtra have witnessed an explosion of cases since March.

"The present study, which recruited subjects from 24 cities in India, provides an important and timely snapshot of the spread of SARS CoV2 pandemic across India shortly before the peak of new cases.

It confirms that by September 2020, a large pool of recovered Indians with at least partial immunity existed, the paper said.

Between its study and the other national sero-survey at the same time, more than a hundred million Indians were likely to belong to this category, it estimated.

The study said the fraction of such recovered people was more than double amongst those performing high-contact jobs and using public transport.

Thus, in combination with a strong emphasis on masking and distancing, new cases started declining soon after this sero-survey which started in June.

(With inputs from agencies)

A survey by the Council for Scientific and Industrial Research (CSIR) has suggested that the recurrence of coronavirus outbreak in March could have been due to lack of "meaningful antibodies" in seropositive people after a peak in September last year.

A survey by the Council for Scientific and Industrial Research (CSIR) has suggested that the recurrence of coronavirus outbreak in March could have been due to lack of "meaningful antibodies" in seropositive people after a peak in September last year. The CSIR conducted a sero-survey on 10,427 people comprising the staff members of its 40 laboratories, including contractual employees, and their family members from 17 states and two union territories. In 10,427 people, the average seropositivity was 10.14 per cent. The survey suggested that the neutralising antibodies declined significantly after five-six months, making people prone to reinfections. The coronavirus cases in the country peaked in September 2020 and there was a nationwide decline of new cases starting in October, said Shantanu Sengupta, one of the lead authors of the paper. "Our data shows that while anti-NC (nucleocapsid) antibodies provide long-lasting evidence of viral exposure or infection, about 20 per cent of seropositive individuals lack meaningful neutralisation activity after 5-6 months. "Using more stringent measures (more than 30 per cent inhibition of surrogate receptor-spike protein binding), the loss of neutralisation maybe even higher. We speculate that this may be related to the recurrence of outbreaks in March 2021 after the peak in September 2020," the paper said. India is currently witnessing a massive surge in infections with logging a daily case count of over 3,00,000 on four consecutive days. According to the paper, the aggregate sero-positivity of 10. 14 per cent in its multi-centre study suggests India had a large pool of recovered immune subjects by September 2020, especially amongst its high contact workers and people using public transport, leading to a decline in new infections. "However, the duration of such immunity may not be sufficient to prevent future outbreaks, even in highly affected regions, the paper said. States like Maharashtra have witnessed an explosion of cases since March. "The present study, which recruited subjects from 24 cities in India, provides an important and timely snapshot of the spread of SARS CoV2 pandemic across India shortly before the peak of new cases. It confirms that by September 2020, a large pool of recovered Indians with at least partial immunity existed, the paper said. Between its study and the other national sero-survey at the same time, more than a hundred million Indians were likely to belong to this category, it estimated. The study said the fraction of such recovered people was more than double amongst those performing high-contact jobs and using public transport. Thus, in combination with a strong emphasis on masking and distancing, new cases started declining soon after this sero-survey which started in June. (With inputs from agencies)

COVID-19 reinfection in India could be due to lack of 'meaningful antibodies': CSIR survey

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People with 'O' blood group less vulnerable to COVID-19: Indian research body

COVID-19 reinfection in India could be due to lack of 'meaningful antibodies': CSIR survey