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Developments on vaccine front offer a tentative timeline on when it could be available on a mass scale

SII and ICMR are conducting phase II/III clinical trial of the vaccine at 15 different centres across the country.

According to the study, published in 'Behavioural Ecology', as a pathogen spreads across a population, changes in social behaviour can alter how the disease spreads

"All significant medical incidents, whether participants are in the control group or the COVID-19 vaccine group, are independently reviewed."