From the Document: "Coronavirus disease 2019 (COVID-19) is a respiratory illness caused by a virus called SARS-CoV-2 [severe acute respiratory syndrome coronavirus 2]. Symptoms often include cough, shortness of breath, fever, chills, muscle pain, sore throat, or new loss of taste or smell. [...] The virus is thought to spread mainly from person-to-person:  Between people who are in close contact with one another (within about 6 feet);  Through respiratory droplets produced when an infected person coughs, sneezes, or talks[.] Recent studies indicate that the virus can be spread by people who are not showing symptoms. [...] As a grocery or food retail worker, potential sources of exposures include close contact for prolonged periods of time with a customer with COVID-19 and touching your nose, mouth, or eyes after handling items, cash, or merchandise that customers with COVID-19 have touched."
Centers for Disease Control and Prevention: https://www.cdc.gov/