“can persist” is not specified with a percentage of flu patients, and thus cannot be inferred to be “common” as you state from the evidence provided alone. Pre

“can persist” is not specified with a percentage of flu patients, and thus cannot be inferred to be “common” as you state from the evidence provided alone. Precisely what overall percentage of flu patients across the general population experience continuing symptoms after 14-21 days? (Any common influenza in any typical year in the past decade is fine.)