The phrase "flu cases" refers to the number of people who are diagnosed with or have the flu, a contagious respiratory illness caused by the influenza virus. Full definition
The number of reported flu cases to the county health department is declining, but the commissioner says there are still substantial amounts of flu circulating in the community. (news.wbfo.org)
Symptoms such as headaches and muscle cramps account for many keto flu cases. (lowcarbalpha.com)
The number of flu cases in New York State continues to rise, and the latest figures also show additional deaths related to the flu in Monroe County. (wxxinews.org)