Covid-19: 'Social distancing and lockdown most potent vaccine'
Union health minister Harsh Vardhan stressing on the need for people to follow stringent isolation measures said on Thursday that social distancing and lockdown at present are potent 'social vaccines' against Covid-19 in absence of a cure. At present, cases are doubling every 4.5 days in India, whereas majority of the districts are unaffected, Vardhan said.