10.1016/S0140-6736(21)01115-6
Journal article
Lancet
29/05/2021
397
2043 - 2046
BNT162 Vaccine, COVID-19, COVID-19 Vaccines, ChAdOx1 nCoV-19, Cross Protection, Humans, Immunity, Heterologous, Immunization, Secondary, Immunogenicity, Vaccine, Mass Vaccination, SARS-CoV-2