covid-19 patients’ contacts might have already acquired immunity, according to a study published in the Indian Journal of Public Health.
The findings of the study done by Ahmedabad Municipal Corporation, Gujarat on over 4000 contacts of covid-19 positive patients may help the central government further fine tune its vaccination and contact tracing strategy in the backdrop of a second wave spreading across the country.In significant findings, with 1268 positive for IgG antibodies from 3973 samples, the seropositivity against covid 19 among contacts of cases in Ahmedabad was 31.92%.