Booster pictures: Do you have to get an additional dose of coronavirus vaccine?



A booster vaccine being given in Derby, UK, last week

Paul Ellis/AFP via Getty Images

OVER the next few months, about 30 million fully vaccinated people in the UK will be invited to have a third dose of a covid-19 vaccine. The surprise decision to run such a large booster campaign – everyone over 50 is included – was made off the back of multiple lines of evidence, none of them definitive. So what is the rationale behind it? And if you are offered a booster, should you take it?

The UK isn’t the only country looking to …