Gatherings of more than 500 people should be cancelled to help stop the spread of coronavirus, Prime Minister Jacinda Ardern says.
It's only an 18-second video clip but it is being hailed on social media as the best advice you can have for avoiding spreading the coronavirus.
Graham Medley, Professor of Infectious Disease Modelling, told BBC Newsnight people shouldn't act like someone who is avoiding contracting the virus but rather assomeone who already has the virus and is trying not to pass it onto others.
The advice, hailed as "probably the best single piece of advice I've heard about the #coronavirus" by a Twitter user, has been shared thousands of times in just a few hours.
"Most people have a fear of acquiring the virus. I think a good way of doing it is to imagine that you do have the virus, and change your behaviour so that you're not transmitting it," he said.
— Angela🛡3.5% Rebel with many causes #ToriesOut (@spaceangel1964) March 13, 2020
Worth catching the @GrahamMedley bit on Newsnight. Calm, clear and a good shorthand for how people should behave: “Act as if you’re infected and don’t want to pass it on. Not as if you’re trying to avoid being infected.”