The incidence of effective immune reactivation on the 14th day of enrollment (Geometric mean titers (GMTs) of neutralizing antibodies produced in response to SARS-CoV-2 live virus increased 4 times or more from baseline; or changed from negative to positive from baseline);

The incidence of effective immune reactivation on the 14th day of enrollment (Geometric mean titers (GMTs) of neutralizing antibodies produced in response to SARS-CoV-2 live virus increased 4 times or more from baseline; or changed from negative to positive from baseline);