HealthCan coronavirus variants reinfect people and evade the vaccines? It looks like some of the new coronavirus variants can evade parts of our immune response, but it's not yet clear if we need to update the vaccines News
HealthThe UK may struggle to hit its covid-19 vaccine target – here's why UK prime minister Boris Johnson has set a target of 15 February by which 13.9 million people in high-priority groups should be vaccinated against covid-19, but manufacturing, safety checks and distribution logistics will make that difficult Analysis