Haematologist Dr Tahir Shamsi has passed away in Karachi. Dr Shamsi had undergone a surgery last week after suffering brain haemorrhage. He was in the intensive care unit of the Aga Khan University Hospital and his condition was reported to be critical. Who is Dr Tahir Shamsi? Dr Shamsi is credited with introducing bone-marrow transplant in Pakistan in 1996. So far, he performed 650 bone-marrow transplants and wrote over 100 research articles. During the first wave of coronavirus, Dr Shamsi came up with the idea of treating COVID-19 patients using plasma of those who recovered from the virus. In 2016, the Dow Graduates Association of North America honoured him with.