inclusion criteria: * for part a, participants must be aged 18 years or older at the time of obtaining informed consent * for parts b and c, participants must be aged between 18 years and 69 years old at the time of obtaining informed consent * participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms

inclusion criteria: * for part a, participants must be aged 18 years or older at the time of obtaining informed consent * for parts b and c, participants must be aged between 18 years and 69 years old at the time of obtaining informed consent * participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms

inclusion criteria: - for part a, participants must be aged 18 years or older at the time of obtaining informed consent - for parts b and c, participants must be aged between 18 years and 69 years old at the time of obtaining informed consent - participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms

inclusion criteria: - for part a, participants must be aged 18 years or older at the time of obtaining informed consent - for parts b and c, participants must be aged between 18 years and 69 years old at the time of obtaining informed consent - participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms

inclusion criteria: - participant must be aged 18 years or older at the time of obtaining informed consent - participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms

inclusion criteria: - participant must be aged 18 years or older at the time of obtaining informed consent - participants who have a positive sars-cov-2 test result ≤7 days prior to enrollment and oxygen saturation ≥94% on room air and have covid-19 symptoms and ≤7 days from onset of symptoms