New Coronavirus Report : India needs to vaccinate 70% population to contain COVID-19, says Vaccine expert Gagandeep Kang. To slow the spread of COVID-19 and decrease transmission, India needs to vaccinate at least 70 percent of the population, said Gagandeep Kang, professor of Microbiology at the Christian Medical College. The government has said that about 30 crore Indians will be vaccinated against novel coronavirus by July 2021.