Comparative effectiveness of heterologous third dose vaccine schedules against severe covid-19 during omicron predominance in Nordic countries: population based cohort analyses.
Niklas Worm AnderssonEmilia Myrup ThiessonUlrike BaumNicklas PihlströmJostein StarrfeltKristýna FaksováEero PoukkaLars Christian LundChristian Holm HansenMia AakjærJesper KjærCatherine CohetMathijs GoossensMorten AndersenJesper HallasHinta MeijerinkRickard LjungAnders HviidPublished in: BMJ (Clinical research ed.) (2023)
Heterologous booster schedules are associated with increased protection against severe, omicron related covid-19 outcomes compared with primary course schedules and homologous booster schedules.