Healthcare Bill Gates stresses, 'coronavirus will define present era, those who survive will never forget' Updated : April 24, 2020 12:09 PM IST Currently, over 70 vaccines are in various stages of development. The basic principle should be to allow activities that have a large benefit to the economy or human welfare but pose a small risk of infection. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.