coronavirus are becoming more powerful and changing their behaviour to infect as many victims as possible, scientists claim.
Researchers studying the killer bug are watching the Covid-19 virus shape-shift into new forms which make it far easier to catch.
They could soon have the potential to overcome barriers such as masks, they fear. PM Boris Johnson has repeatedly warned the British public that they will face fines for not wearing face coverings.
But his efforts may be in vain as the clever virus finds novel methods to become more contagious, the US scientists said. Experts in Houston have been sequencing the genomes of the killer virus since March and have tracked 5,085 sequences.