An estimated 6.4 million people were infected with the coronavirus disease (Covid -19) in India by early May, show the findings of the first national serosurvey conducted by the Indian Council of Medical Research.
“Population-weighted seroprevalence after adjusting for test performance was once 0.73 per cent… Males, living in urban slums and occupation with high risk of exposure to potentially infected persons were associated with seropositivity. A cumulative 6,468,388… adult infections were estimated in India by the early May,” said the findings published in the Indian Publication of Medical Research (IJMR).
On the other hand, till May-end the country’s official caseload was once approximately 200,000, which is kind of 3% of the estimated cases found in the survey. The country’s current case load is near to 4.6 million, hinting at insufficient testing for the disease, experts said.
“That has at all times been the concern that testing was once not adequate as India was once in large part testing symptomatic cases and asymptomatic positives is a big number that may have been missed. It was once important to cast the net wide, more so for asymptomatic people. It only boils down to the truth that we want to increase our testing,” said Dr Lalit Kant, former head, epidemiology and communicable diseases, ICMR.
As a part of the community-based survey, which was once held from May 11 to June 20, a complete of 30,283 households were visited and 28,000 individuals were enrolled for the study across 21 states. According to the survey, those between the age group of 18-45 years were the worst-affected with 43.3% of them having developed antibodies against SARS-CoV-2, the virus that causes Covid-19. Those with a past infection between 46 and 60 years of age comprised 39.5% of the sampled individuals.
“The results, on the other hand, seem to be more right to the ground reality at that point in time, and this can be a immense number” said Dr Kant.
The published literature indicates that the IgG antibodies against SARS-CoV-2 infection start appearing by the end of the first week after symptom onset and most cases are IgG positive by the end of second week, according to the researchers.