What happened: Dr. Tahir Shamsi, the country’s most renowned hematologist passed away today due to brain hemorrhage. Details: Dr. Tahir was admitted to a private medical facility in the city last week after suffering a brain hemorrhage. According to doctors, he underwent surgery but his condition remained critical and he was on a ventilator. Dr. Shamsi is credited with introducing bone marrow transplants to Pakistan in 1996. He has performed 650 bone marrow transplants and authored over 100 research articles during his career. During the first wave of coronavirus, Dr Shamsi proposed treating Covid-19 patients with plasma from those who had recovered from the virus.