Around 40 crore people are still vulnerable to Covid-19 infection as a nationwide survey found two-thirds of the country's population aged above six to have SARS-CoV-2 antibodies, the government said on Tuesday as it stressed there is no room for complacency in the fight against the pandemic.

Findings of the ICMR's fourth national Covid-19 sero survey show there is a ray of hope, but there is no room for complacency and Covid-appropriate behaviour has to be followed, the government said. The Indian Council of Medical Research (ICMR) conducted the latest survey in June-July. Addressing a press conference, a senior official said two-thirds or 67.6 per cent of India's population aged above six years were found to have SARS-CoV-2 antibodies in the latest national sero survey.