inclusion criteria: male or female between the ages of 18 to 54 years, inclusive. negative for sars-cov-2 infection at the time of screening in generally good health, without significant medical illness demonstrates comprehension of the protocol procedures and is able to provide written informed consent. available for all planned visits and willing to complete all protocol defined procedures and assessments body mass index between 17 and 30 kg/m2 at screening. female subjects must have a negative pregnancy test at screening and before each vaccination and fulfill an acceptable method of birth control (per protocol)

inclusion criteria: male or female between the ages of 18 to 54 years, inclusive. negative for sars-cov-2 infection at the time of screening in generally good health, without significant medical illness demonstrates comprehension of the protocol procedures and is able to provide written informed consent. available for all planned visits and willing to complete all protocol defined procedures and assessments body mass index between 17 and 30 kg/m2 at screening. female subjects must have a negative pregnancy test at screening and before each vaccination and fulfill an acceptable method of birth control (per protocol)

inclusion criteria: 1. male or female between the ages of 18 to 54 years, inclusive. 2. negative for sars-cov-2 infection at the time of screening 3. in generally good health, without significant medical illness 4. demonstrates comprehension of the protocol procedures and is able to provide written informed consent. 5. available for all planned visits and willing to complete all protocol defined procedures and assessments 6. body mass index between 17 and 30 kg/m2 at screening. 7. female subjects must have a negative pregnancy test at screening and before each vaccination and fulfill an acceptable method of birth control (per protocol)

inclusion criteria: 1. male or female between the ages of 18 to 54 years, inclusive. 2. negative for sars-cov-2 infection at the time of screening 3. in generally good health, without significant medical illness 4. demonstrates comprehension of the protocol procedures and is able to provide written informed consent. 5. available for all planned visits and willing to complete all protocol defined procedures and assessments 6. body mass index between 17 and 30 kg/m2 at screening. 7. female subjects must have a negative pregnancy test at screening and before each vaccination and fulfill an acceptable method of birth control (per protocol)