inclusion criteria: - healthy subjects of either gender, age ≥ 18 years, with recent history of close contact with covid-19 patients. - subjects with sars cov 2 negative test (icmr approved test kit) at screening visit. - female subject 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 months post-dosing. - the subject 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.

inclusion criteria: - healthy subjects of either gender, age ≥ 18 years, with recent history of close contact with covid-19 patients. - subjects with sars cov 2 negative test (icmr approved test kit) at screening visit. - female subject 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 months post-dosing. - the subject 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.