You’re Welcome, Alamo-Girl!
FReeper darnright pointed me to a blog that includes some good general info on vitamin D. Getting vitamin D right. Don't recall seeing before that the vitamin D in milk is often D2, not D3. Would expect that years ago but not today.
FReeper LucyT pointed me to this: H11N1 strain isolated in one Eurasian Spoonbill: Report (flu types). I thought it had some good basic info on flu types, especially avian flu.