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XBB subvariant may trigger another wave of COVID-19 infection: WHO chief scientist

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New Delhi, Oct 20: Amid XXB variant of Covid-19 fear, the chief scientist of World Health Organisation (WHO), Dr Soumya Swaminathan on Thursday warned that some countries may see "another wave of infections". However, she said that there was no data from any country to suggest that these new variants are clinically more severe.

Dr Soumya Swaminathan

Talking to reporters on the sidelines of the annual general meeting of the Developing Countries Vaccine Manufacturers Network (DCVMN) here, "there are over 300 subvariants of Omicron. I think the one that is concerning right now is XBB, which is a recombinant virus. We had seen some recombinant viruses earlier. It is very immune-evasive, which means it can overcome the antibodies. So slightly that we may see another wave of infections in some countries because of XBB,'' she said.

Swaminathan said they are also tracking derivatives of BA.5 and BA.1, which are also more transmissible and immune-evasive. As the virus evolves, it is going to evolve more and more transmissible, she said.

Dr Swaminathan said monitoring and tracking are the key steps to fight these variants.

''We need to continue to monitor and track. We have seen that testing has gone down across countries, the genomic surveillance has also gone down over the last few months. We need to maintain at least a strategic sampling of genomic surveillance so that we can keep tracking the variants as we have been doing and studying,'' she said.

''As far as vaccine coverage is concerned, our goals are 100 per cent of people over the age of 60 and 100 per cent of health care and frontline workers. Then we have a goal of achieving 70 per cent of the country, but subgroups are more important because they are most likely to face morbidity and mortality,'' she said.

She said that a number of deaths from elderly groups were seen when Omicron spread as they were not fully vaccinated. ''The full vaccination schedule is actually three doses. The primary two doses plus booster in the next four to six months. But in many countries, including India, the uptake of the booster is low. So we really encourage people to take the third dose,'' she said.

She advised continuing to use masks for protection from infection.

''While vaccines are still protecting us from severe disease and hospitalization, the risk of long COVID conditions seems to increase with each infection. So it is not benign. We should not be too casual by saying that it is okay to get the infection.

with PTI inputs

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