A considerable section of the population, who have not yet been exposed to the COVID-19 virus, remain at risk of infection, the results of the second national sero-survey, which was conducted by top medical body ICMR between August 17 and September 22, have revealed. The findings also showed that around 7.1 per cent of India's adult population (aged 18 and above) showed evidence of past exposure to the virus so far. Specifically, the sero-survey showed that only one in 15 people (aged 10 and above) had likely been exposed to the virus by the end of August, with the risk of infection two times higher in slums as compared to non-slum areas of urban centres, and four times higher than rural areas.