67.6% population above 6 yrs found to have Covid antibodies in 4th national serosurvey, Lok Sabha told

67.6% population above 6 yrs found to have Covid antibodies in 4th national serosurvey, Lok Sabha told In order to avoid wastage of medical oxygen, guidelines on rational use of oxygen were issued on September 25, 2020, and further revised and disseminated to states on April 25, 2021. https://ift.tt/eA8V8J