This is a Phase II, prospective, placebo-controlled, double-blinded (investigator/site staff and participants), multi-center, multi-regional study; the Sponsor will be blinded until the interim analysis. Participants who are generally healthy or with stable pre-existing health conditions will be randomized, stratified by age (≥ 20 to < 65 years and ≥ 65 years of age).All eligible participants will be randomized to receive 2 doses of either MVC-COV1901 or placebo in a predefined ratio.
The purpose of this study is to assess the safety and immunogenicity of MVC-COV1901 vaccine compared to placebo in participants who are generally healthy or with stable pre-existing health conditions.