Herd immunity may come before COVID-19 vaccine goes off the shelf: AIIMS Director

AIIMS Director Randeep Guleria in an interview to IANS said we may reach a stage down the line where we may have a good amount of immunity, and the people may feel that there is now good immunity and the utility of the vaccine is not there. He added, if the virus doesn't mutate or does not cause changes then people may not think...