There's new evidence to suggest that speaking and not just coughing and sneezing can spread COVID-19.
A study in the New England Journal of Medicine has found tiny droplets that come out of the mouth while speaking are infectious.
Professor of Immunology at Trinity College Dublin, Luke O’Neill, says the research proves everyone should be wearing a mask.
"The original idea was that you would wear it to protect the other person from coughing.
"But now the fact that you can breathe the stuff out, you've got to wear a mask for definite.
"This science absolutely supports that, which is what we like - we need a scientific basis for claiming things, and that's why these studies are so good I think."
