If we loosen restrictions too early, there is a real risk of a third wave in the UK | Devi Sridhar

Not enough people are vaccinated against Covid as a new variant spreads, requiring us to remain vigilant for a little longer

Just when it felt like we could begin to relax again, Covid-19 has thrown us yet another curveball. While we've been debating in the UK where to go for a holiday and booking long-overdue nights out with friends, the virus has been causing havoc across the world.

The Kent variant, B.1.1.7, found its way into countries such as Taiwan and Singapore; P.1 is causing another wave in Brazil; and most devastatingly, the highly transmissible variant B.1.617 (which has three subtypes) is causing a public health crisis in India. The country has seen cases surging with estimated deaths to be several times greater than that being reported by the government, which continues to downplay the epidemic.