Having Iranian citizenship; Age 18 years and older; Having history of full vaccination with Sinopharm vaccine (two doses) 75 to 195 days from the last vaccination; Signing an informed consent form; For females of childbearing age 18 to 49 years: use of at least one effective method of contraception (condom, oral contraceptive pills, intrauterine device, norplant capsule) and willing to continue up to two month after the booster dose.

Having Iranian citizenship; Age 18 years and older; Having history of full vaccination with Sinopharm vaccine (two doses) 75 to 195 days from the last vaccination; Signing an informed consent form; For females of childbearing age 18 to 49 years: use of at least one effective method of contraception (condom, oral contraceptive pills, intrauterine device, norplant capsule) and willing to continue up to two month after the booster dose.