More Frequent Side-Effects Reported Mixing Pfizer and Oxford Covid Jabs, Study Suggests

May 13, 2021

(The Guardian) – Administering one dose of the Pfizer/BioNTech vaccine followed by one of the Oxford/AstraZeneca vaccine (or vice versa) induces a higher frequency of mild to moderate side-effects compared with standard two doses of either vaccine, initial data from a key UK trial suggests. The Oxford-led Com-Cov study is exploring the safety and efficacy of mixed-dose schedules given that they are being considered in several countries – including the UK – to fortify vaccine rollout programmes that are dependent on unstable vaccine supplies.