Any time there are large numbers of people gathered in a relatively confined space, the risk for the spread of infections and other health threats increases. This is particularly true if you have a chronic illness like COPD. If you plan on traveling to where there are many people, there are steps you can take to protect yourself. The Centers for Disease Control and Prevention (CDC) has a resource to help minimize your risk.
Click on this link to see how to protect yourself in large crowds: Travel to Mass Gatherings