Comparative effectiveness of heterologous booster schedules with AZD1222, BNT162b2, or mRNA-1273 vaccines against COVID-19 during omicron predominance in the Nordic countries https://www.medrxiv.org/content/10.1101/2022.11.24.22282651
Comparative effectiveness of heterologous booster schedules with AZD1222, BNT162b2, or mRNA-1273 vaccines against COVID-19 during omicron predominance in the Nordic countries https://www.medrxiv.org/content/10.1101/2022.11.24.22282651