Study cohort
A total of 56 samples from 43 individuals vaccinated with SARS-CoV-2
vaccines were enrolled in this study. The ages of vaccinated subjects
were ranging between 21 and 32 years. The vaccinated donors who were
suffering from infectious diseases or autoimmune diseases, and
experiencing any inflammation or infection within a week before sampling
were excluded from this study. Subjects were divided into three groups
according to different types of vaccine they received, including
inactivated vaccine group (CoronaVac, Sinovac Biotech, China),
recombinant protein subunit vaccine group (ZF2001, Zhifei Biological,
China) and adenovirus-vectored vaccine group (Ad5-nCoV, CanSino
Biologics, China). The basic information of the enrolled volunteers is
summarized in Table 1.