As air quality due to wildfire smoke remains poor in parts of Western Canada, health experts are advising people to stay inside as much as possible. But they say if you need to be outside, wear a mask. Calgary respirologist Dr. Alex Chee says N95 masks do the best job of filtering out smoke particles. But if people only have surgical masks, he says that’s better than nothing. Chee says wildfire smoke can cause both lung and heart problems. …There are things people can use to reduce the smoke’s effect, says Dr. Anne Hicks, a pediatric respirologist and assistant professor at the University of Alberta. “Because of the pandemic, a lot of people have added HEPA filtration or MERV filtration to their businesses, which means we have more safe places to be indoors.”