COVID-19, do not have cancer and are not immunocompromised (having a weak immune system)."The BCG vaccine has offered hope to the elderly, and if found effective, it will help bring down morbidity and mortality in elderly population," said the BMC, which is spearheading Mumbai's response to the COVID-19 pandemic.The trial will be primarily undertaken in F-south and G-south civic wards in Central Mumbai, where elderly individuals will be encouraged to participate in the study."Number of participants expected to be enrolled in the trial is 250 and the number can go up if the trial demands," the civic body said.The BCG vaccine will be administered after obtaining informed consent from participants who will then be closely monitored for 6.