COVID-19 warrior Dr Abhijit Sarma is back on duty after battling the coronavirus that he contracted while on duty on July 19. The Guwahati Medical College Hospital superintendent was given convalescent plasma soon after he was infected and he believes it worked. "Our experience here has been that whenever the saturation falls below 95, early plasma therapy has been a great help. It has really helped to catch the falling saturation levels and that applies to me too. I was a COVID-19 patient with falling saturation. My saturation went down to 92. I was given plasma and saturation went up to 98 within six hours," Dr Sarma told NDTV.