On Thursday, the U.S. Centers for Disease Control and Prevention (CDC) released a study of COVID-19 patients.The study focused on the activities they participated in and interactions they had before getting COVID-19.Whether they'd visited a restaurant, bar, or coffee shop was the biggest factor in those who tested positive.Exposures and activities where mask use and social distancing are difficult to maintain, including going to places that offer on-site eating or drinking, might be important risk factors for acquiring COVID-19, Study Authors.The CDC did acknowledge that there are limitations to this study.The "I went to a restaurant" option didn't differentiate between indoor or outdoor.Bars and coffee shops were combined into one category, despite the fact that they "might represent different exposures.".But despite the limitations, this study certainly makes us wonder about visiting places where using masks can be difficult