Cohort Study: The effectiveness of heterologous AstraZeneca (AZ)/mRNA prime-boost vaccination was more significant (68%) compared to the effectiveness of homologous AZ/AZ vaccination (50%) against symptomatic Covid-19 infection in Sweden.
20 Oct, 2021 | 10:27h | UTCCommentary: High effectiveness of mix-and-match COVID-19 vaccines – UMEA University
Related:
A primer on what we know about mixing and matching Covid vaccines.
Another study shows increased immune response with heterologous Oxford-AstraZeneca/mRNA vaccination.
RCT: Mixing 2 different Covid vaccines is associated with increased risk of side effects.
Commentary on Twitter
Study from Sweden assessing heterogenous vaccination in 3,445,061 individuals who received AZ as the first dose and either #pfizer, #moderna, or #AZ as second dose showed the following vaccine effectiveness:
AZ/Pfizer- 67%
AZ/Moderna- 79%
AZ/AZ- 50%https://t.co/UN0pey2kJ2— Yan Leyfman, MD (@YLeyfman) October 19, 2021