If you’re the only one in a mask, will it still keep you safe?

Masks were once mandatory in public places but, as the rules have loosened, fewer people appear to choose to wear one, RNZ reports. People are still encouraged to wear a mask in crowded places, enclosed spaces with poor ventilation, close contact settings, or when visiting people at high risk. Epidemiological modeller James Trauer says wearing a mask was still considerably better than nothing. “However, it is likely that the greatest effect is when the infector [the person with Covid-19] is wearing one,” he said. “This is one of the strongest justifications for requiring everyone to wear a mask, particularly indoors.”