CDC study finds household COVID-19 transmission commonNew data released today in Morbidity and Mortality Weekly Report (MMWR) show that household transmission of SARS-CoV-2, the virus that causes COVID-19, is common, occurs early after illness onset, and can originate from both children and adults.In a study conducted among households in Nashville, Tennessee, and Marshfield, Wisconsin, researchers from the Centers for Disease Control and Prevention and their partners enrolled 101 households (including 101 index patients and 191 household members) and asked participants to document their symptoms and obtain self-collected specimens for 14 days.