“So they are super spreaders sometimes, of usual viruses like flu viruses,” before he explained the potential dangers of public transport.
“In terms of public transport, I think people need to start distancing themselves as much as possible.
“Crowded tubes, I think that’s a potential risk. Particularly if you’re changing different carriages.
“Experts have said ‘well you’re only in fleeting contact with other people,’ but it doesn’t take very long,” he warned.
Good Morning Britain airs weekdays at 6am.