- Adults 18 years of age or older - Men and women - Healthy or with stable chronic medical conditions specifically including asthma, stable HIV, hepatitis B virus, or hepatitis C virus infection, will be eligible for participation in the trial while all rest comorbidities will be an exclusion. - Must have history of 2 times homologous vaccine intervention of BBIBP-CorV vaccine.

- Adults 18 years of age or older - Men and women - Healthy or with stable chronic medical conditions specifically including asthma, stable HIV, hepatitis B virus, or hepatitis C virus infection, will be eligible for participation in the trial while all rest comorbidities will be an exclusion. - Must have history of 2 times homologous vaccine intervention of BBIBP-CorV vaccine.