A CDC study suggests that adults with COVID-19 are twice as likely to say they have dined in a restaurant in the 14 days before becoming ill than those who tested negative, according to a new study from the US Centers for Disease Control and Prevention.

The researcher wrote the following:

"In addition to dining at a restaurant, case-patients were more likely to report going to a bar/coffee shop, but only when the analysis was restricted to participants without close contact with persons with known COVID-19 before illness onset..

In July data was gathered from a study of 314 adults who were tested for COVID-19 after experiencing symptoms. Of those studied, 154 tested positive and 160 tested negative.Tests were administered at 11 different health care facilities across 10 US states: California, Colorado, Maryland, Massachusetts, Minnesota, North Carolina, Ohio, Tennessee, Utah and Washington.

CDC researchers took a close look at the answers given by those patients  to questions regarding wearing masks and various activities in the community, including whether they recently dined at a restaurant, hung out a bar or went to a gym, for instance.

The data showed that 42% of the adults who tested positive, reported having close contact with at least one person known to have Covid-19, compared with 14% of those who tested negative -- and most of the close contacts, 51%, were family members.
Reports of exposures in restaurants have been linked to air circulation. Direction, ventilation, and intensity of airflow might affect virus transmission, even if social distancing measures and mask use are implemented according to current guidance," the researchers wrote.