? Acute severe illness ? Recent receipt of a blood product ? History of thrombocytopenia ? Pregnant females ? Any chronic medical condition ? Any participant receiving any immune suppressive medication ? Immunocompromised staff ? Participants who have egg allergy ? Participants who care for immune compromised hosts at home ? Participants who had documented COVID-19 either by RT-PCR or radiologically in the past six months

? Acute severe illness ? Recent receipt of a blood product ? History of thrombocytopenia ? Pregnant females ? Any chronic medical condition ? Any participant receiving any immune suppressive medication ? Immunocompromised staff ? Participants who have egg allergy ? Participants who care for immune compromised hosts at home ? Participants who had documented COVID-19 either by RT-PCR or radiologically in the past six months