Justinian Code, was the result of Emperor Justinian's desire that existing Roman law be collected into a simple and clear system of laws, or code.. Tribonian, a legal minister under Justinian, lead a group of scholars in a 14-month effort to codify existing Roman law.
it was a tragic pandemic, but yes it did happen in 1918-1919. the plague happened in 1346-1352. Aids were in 1981. so there for making influenza the correct one.