Belgian biotech company ZenTech has started producing coronavirus antibody tests. ? AFP Photo/Kenzo Tribouillard KARACHI: Sindh on Sunday reported its first successful recovery from the passive immunisation therapy of a coronavirus patient. The treatment had been approved earlier in March. “The first patient to recover from the coronavirus with the use of passive immunisation therapy has been sent home,” the head of the National Institute of Blood Disease & Bone Marrow Transplantation (NIBD & BMT) and hematologist, Dr Tahir Shamsi, said.