Two health workers from Mayo Hospital in Lahore have tested positive for Covid-19 after having been administered a vaccine. The Mayo Hospital health support staffer and his staff nurse wife at the institution were among the seven employees administered the Chinese Sinopharm vaccine recently under a government drive to vaccinate health professionals.
The couple was administered the first shot on Feb 4 and tested positive for Covid-19 three weeks later. The positive tests create doubts about efficacy of the vaccine, even though a second dose is yet to be administered.
A senior physician was of the view that there were conflicting reports about the efficacy of Covid-19 vaccines. Some shots offered 75 per cent immunity and others 95pc, but the exact duration that the immunity lasted was not known yet.