Express News Service PATNA: Despite all the claims of the Bihar government, the black marketing of medical oxygen continues in the state on a large scale. Barring a few big government hospitals, almost all private and district-level government hospitals are reportedly facing shortage of medical oxygen. As a result of it, fatality rate among the COVID-19 positive patients admitted in hospitals has increased to an alarming extent. Sources from medical fraternity said that nearly 50 to 55 per cent of corona patients, admitted in private and government hospitals, die everyday for want of oxygen out of total deaths reported in the state.