The Centre announced the findings of the 4th seroprevalence study conducted by the ICMR. According to the survey, nearly one-third of the country's population is still vulnerable to Covid-19 infection. 67.6% of India's population above 6 years was found to have SARS-CoV-2 antibodies. This was the first time that children above six years were included in the sero prevalence study. The study was conducted in 70 districts. There is still no room for complacency and we must maintain Covid-appropriate behaviour.