“We are seeing a surge of infection across the country. Fortunately, the severity of the disease is mild because of multiple factors including the effect of vaccination, the intrinsic character of the variant itself, and natural immunity amongst the population,” said Dr. D Nageshwar Reddy, Chairman, AIG Hospitals in a statement.”The study aimed to understand the effectiveness of current vaccines over the long-term and see if there are specific population demography who need a booster at the earliest,” he added.The study was conducted on a large pool of 1,636 healthcare workers who were fully vaccinated.Researchers measured the IgG anti-S1 and IgG anti-S2 antibodies to SARS-CoV-2 in all the participants.It was estimated that an antibody level of 100 AU/ml is the minimum level for protection against the virus, which means any individual with less than 100 AU/ml antibody level is susceptible to getting infected.Those who had antibodies levels less than 15 AU/ml were considered antibody negative, which means they didn’t develop any protective immunity against the virus.
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