1.Health care workers including doctors, nursing staff, para â?? medical staff and sanitation workers who shall be going for the COVID-19 isolation ward duty. <br/ >2.Female healthcare workers who are currently using reliable methods of contraception (barrier methods and intrauterine contraceptive device), with a negative urine pregnancy test during screening and agree to informed compliance of contraceptive method until at least 3 months post-revaccination with BCG. <br/ >3.The participants must be able and willing to comply with the study protocol, available and willing to complete all the study assessments and must have signed an Informed Consent Form <br/ >

1.Health care workers including doctors, nursing staff, para â?? medical staff and sanitation workers who shall be going for the COVID-19 isolation ward duty. <br/ >2.Female healthcare workers who are currently using reliable methods of contraception (barrier methods and intrauterine contraceptive device), with a negative urine pregnancy test during screening and agree to informed compliance of contraceptive method until at least 3 months post-revaccination with BCG. <br/ >3.The participants must be able and willing to comply with the study protocol, available and willing to complete all the study assessments and must have signed an Informed Consent Form <br/ >

1.Health care workers including doctors, nursing staff, para â?? medical staff and sanitation workers who shall be going for the COVID-19 isolation ward duty. <br/ >2.Female healthcare workers who are currently using reliable methods of contraception (barrier methods and intrauterine contraceptive device), with a negative urine pregnancy test during screening and agree to informed compliance of contraceptive method until at least 3 months post-revaccination with BCG. <br/ >3.The participants must be able and willing to comply with the study protocol, available and willing to complete all the study assessments and must have signed an Informed Consent Form <br/ >

1.Health care workers including doctors, nursing staff, para â?? medical staff and sanitation workers who shall be going for the COVID-19 isolation ward duty. <br/ >2.Female healthcare workers who are currently using reliable methods of contraception (barrier methods and intrauterine contraceptive device), with a negative urine pregnancy test during screening and agree to informed compliance of contraceptive method until at least 3 months post-revaccination with BCG. <br/ >3.The participants must be able and willing to comply with the study protocol, available and willing to complete all the study assessments and must have signed an Informed Consent Form <br/ >