ASSAM : Three COVID-19 patients who were in critical condition died at the Gauhati Medical College and Hospital in Assam on Sunday, Health Minister Himanta Biswa Sarma said.With the fresh fatalities, a total of 40 COVID-19 patients have died in the state so far.However, the fresh deaths will be officially added to the state's coronavirus toll only after a Death Audit Board ascertains whether the "underlying cause of death is COVID- 19", Sarma said.The minister had said on Saturday that all deaths where COVID-19 is the "underlying cause will be certified by a Death Audit Board, as per the Indian Council Medical Research's guidelines".Two of the deceased persons were women, aged 40 and 55, hailing from Guwahati, while the third patient was a.