In Covid Fight, Army, Air Force Deploy Doctors, Send Oxygen Tanks Coronavirus: The assistance from the armed forces comes at a time when several hospitals in the country have issued notices to say they have only a few hours of medical oxygen need for COVID-19 patients. Updated: April 22, 2021 12:38 pm IST The IAF has also flown in oxygen containers of the DRDO from Bengaluru to Covid centres in Delhi. New Delhi: The army and the air force have pitched in to help India fight the battle against coronavirus as several parts of the country have been reporting dire shortage of essential medicines and oxygen supply.