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50% population must get vaccine to prevent Covid: study

Aug 28, 2020 07:48 IST

A new study has found that any vaccine against Covid-19 needs to be administered to at least 50% of the population, even if it has 100% efficacy, to break the chain of infection and avert the peak of the pandemic, the Hindustan Times has reported. The study by US scientists published in the American Journal of Preventive Medicine, has flagged vaccine coverage and vaccine efficacy as the two key parameters that need to be watched in detailing a disease-prevention policy. The study says that the vaccine has to have an efficacy of at least 70% to prevent an epidemic and of at least 80% to largely extinguish an epidemic without any other measures.

Covid-19