Ramakrishnan said that people in the UK were "skeptical" about the benefits of using face coverings, and noted that the country was "way behind" other countries when it came to using face coverings, with inconsistent guidance and policies.
"The public have taken to handwashing and distancing but remain skeptical about face coverings," Ramakrishnan said in a statement.
"You only need to go on public transport, where they are supposed to be mandatory, to see how many people are ignoring this new rule based on the growing body of evidence that wearing a mask will help protect others -- and might even protect you."
As per UK government advice for England, face coverings are required on public transport or when visiting hospitals.