From Feb 12 to Apr 9, a total of 9,282 US healthcare professionals (HCPs) were infected with COVID-19, according to a paper published yesterday in the US Centers for Disease Control and Prevention's (CDC's) Morbidity and Mortality Weekly Report.In the same journal, researchers published a case report on three HCPs infected with the novel coronavirus after contact with the first patient with community-acquired COVID-19 in a Solano County, California, hospital in February.Also, a study published today in Nature Medicine of 94 COVID-19 patients in Guangzhou, China, estimated that 44% of secondary case-patients were infected before the index patient experienced symptoms.Healthcare workers made up 3% to 11% of casesThe CDC researchers analyzed