UK Expands COVID Vaccine Mix ‘n Match Trial to Include Moderna and Novavax

A resident receives a dose of the Oxford/AstraZeneca COVID-19 vaccine at the Belong Wigan care home in Wigan, northwest England, on Jan. 21, 2021. Oli Scarff/AFP via Getty Images

A UK study that is examining the effect of mixing different COVID-19 vaccines was expanded on Wednesday to include two more vaccines.

The first round of the Comparing COVID-19 Vaccine Schedule Combinations (COM-COV) trial, which was launched in February, recruited 830 participants to trial combining the Oxford/AstraZeneca vaccine and the Pfizer/BioNTech vaccine.