The UK variant of deadly novel coronavirus has mutated again, a report in BBC News quoted scientists as saying. According to the report, the scientists have observed new genetic changes in the Covid-19 variant, which was already said to be more contagious and "possibly more deadly".

The latest tests have shown a mutation, called E484K. This mutation has already been seen in the South Africa and Brazil variants of the Covid-19 virus.

The experts, BBC spoke to, said that while the mutation may affect vaccine effectiveness, the current ones in use should still work.

Meanwhile, Dr Anthony Fauci warned Americans that the new variant may be more infectious and cause more deaths while infecting individuals who were already infected once.