Efficacy and Safety of Anti-COVID-19 Antibody SA58 Nasal Spray to Prevent Infection in High-risk Populations

Infection rates of asymptomatic and symptomatic COVID-19 patients

Infection rates of asymptomatic and symptomatic COVID-19 patients (i.e., confirmed cases) confirmed by RT-PCR during the study period.

Time frame: Up to 30 days(during case surveillance period)

Incidence of mild, normal, severe, and critical COVID-19 cases

Incidence of mild, normal, severe, and critical COVID-19 cases confirmed by RT-PCR during the study period.

Time frame: Up to 30 days(during case surveillance period)

The peak Ct value

The peak of Ct during the period of COVID-19 infection during the study period.

Time frame: Up to 30 days(during case surveillance period)

Differences in the number of days of negative RT-PCR

Differences in the number of days of negative RT-PCR during the period of COVID-19 infection during the study period.

Time frame: Up to 30 days(during case surveillance period)