A person is vaccinated against covid-19 at Wembley Stadium in London, the UK, in December 2021 Photo by Xinhua/Shutterstock
The coronavirus vaccines have been a brilliant success, possibly . But they haven’t ended the pandemic and their effectiveness has been eroded by the evolution of variants of the SARS-CoV-2 coronavirus. A new generation of covid-19 vaccines is needed – but what exactly should this involve?
The US plans to roll out boosters that target the BA.4 and BA.5 omicron subvariants. Yet variant-specific boosters , not…
