The UK variant of the coronavirus has developed a new, concerning mutation in a small number of cases, which scientists said makes it similar to the South African and Brazilian variants and could reduce the efficacy of vaccines.
The emergence of the mutation to the variant first discovered in Britain highlights how complicated exiting COVID-19 lockdown will be even once vaccines are rolled out.
The nation of 16 million people is nonetheless battling a second wave of Covid-19, with the government imposing new restrictions this month, including a night-time curfew in Dakar.