Sunday, September 26, 2021

Over half in New Delhi may have had Covid-19, survey reports

Figures suggest the population may be approaching herd immunity levels.

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More than half of New Delhi’s 20 million inhabitants may have been infected with Covid-19, according to a government survey whose findings echoed earlier private-sector research.

India has reported nearly 11 million Covid-19 infections, the most anywhere outside the US, but Tuesday’s survey, based on nearly 30,000 samples, suggests the true figure among its 1.35 billion population is dramatically higher and approaching herd immunity levels.

“In the fifth sero survey done in the national capital of Delhi, antibodies have been detected in 56.13% of the city’s population,” Delhi Health Minister Satyendar Jain said on Twitter after the report was published, adding that New Delhi had largely beaten Covid, and India’s daily cases and deaths fell to eight-month lows on Tuesday.

Separate tests done on more than 700,000 people across India by diagnostics company Thyrocare Technologies showed 55% of the population may have already been infected, its chief told Reuters last week.

The World Health Organization says at least 60% to 70% of a population needs to have immunity to break the chain of transmission, though Indian officials have said a lower level can also slow the virus’s spread.

India has reported 154,486 Covid deaths, giving the country a relatively low fatality rate.

One factor in that is the country’s low average age, medical experts say. Two rich states with relatively older populations – Kerala with 3,459 cases and Maharashtra with 1,948 – now account for nearly 70% of new infections.

India has vaccinated nearly four million people since mid-January, when it started what the government touts as the world’s biggest immunisation campaign, which aims to inoculate over 300 million people by August.

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