A total of 168 healthy adult volunteers will be vaccinated in this clinical trial according to open, partly randomized design from the healthy adults aged 18 years and older. The safety and immunogenicity of intramuscular vaccination and mucosal vaccination of two doses of Ad5-nCoV in different administration schedules will be evaluated.
This is a clinical trial to evaluate the safety and immunogenicity of a recombinant adenovirus 5 vectored COVID-19 vaccine (Ad5-nCoV) with two doses and with different adminstration routes in healthy adults aged 18 years and older.