Participants were excluded from the study if they: had history of severe adverse or allergic reactions to previous vaccinations, were pregnancy or planned pregnancy within 4 weeks after vaccination, used of systemic or topical corticosteroids, had bleeding diathesis , received other Covid-19 vaccine, and had SARS-CoV-2 infection before collecting post ID injection blood sample.

Participants were excluded from the study if they: had history of severe adverse or allergic reactions to previous vaccinations, were pregnancy or planned pregnancy within 4 weeks after vaccination, used of systemic or topical corticosteroids, had bleeding diathesis , received other Covid-19 vaccine, and had SARS-CoV-2 infection before collecting post ID injection blood sample.