New UK COVID-19 vaccine recommendations say 'it is reasonable' for people to mix and match different shots, even though there's not yet evidence that works

The UK has authorized two different coronavirus vaccines: one from Pfizer/BioNTech, and another from AstraZeneca/University of Oxford. Both require two doses, given several weeks apart. …

Read More New UK COVID-19 vaccine recommendations say 'it is reasonable' for people to mix and match different shots, even though there's not yet evidence that works