Post-vaccine Covid-19 infections and deaths rare, UK study finds

A very small number of mainly frail, elderly Covid-19 patients are being hospitalised and dying even after receiving the first dose of Pfizer's or AstraZeneca's vaccines, but this does not mean the shots aren't working, UK researchers said on Friday.

Presenting real-world data on a subset of hospitalised Covid-19 patients in the UK, the researchers said the findings showed some level of "vaccine failure" - in other words, cases where vaccinated people still become infected and get sick - but that this was "not unexpected."

"It's mostly occurring in the group which are most at risk of severe disease anyway, which is the...