50% efficacy level for approval of Covid-19 vaccines not enough: Experts

New Delhi: Public health experts have questioned the 50% efficacy level that the government has set for approval of Covid-19 vaccines, saying it falls short of the criterion needed to fight the disease and fails to inspire public confidence.“This does not sound like an impressive rate of infection prevention,” said an expert on condition of anonymity. “Why are we stooping down from the benchmark of 70%?” asked another expert.The criterion was