What a difference a couple of years make. From DoS FOIA reading room; 'Coronavirus' as search term. While not the novel coronavirus….in 2015 some contractor guy was diagnosed with coronavirus while in Iraq and the recommendation was GASP a day in bed! Oh the horror.
https://foia.state.gov/search/Results.aspx?searchText=coronavirus&beginDate=&endDate=&publishedBeginDate=&publishedEndDate=&caseNumber=