 The extreme heat we've been telling you about the last few weeks is causing many people across our area to stay inside these days. WTOP Scott Gellman tells us it's one reason experts say respiratory viruses like COVID are going around again this summer. They're not easily spread when it's very hot and humid like it's been around here recently. But Andrew Pekosz with the Johns Hopkins Bloomberg School of Public Health explains those conditions are encouraging people to change their behaviors and be inside.