i think that the Spanish flue never ended. It continues in various forms. Remember its a virus that replicates. When it is transmitted it mutates and probably weakens in the presence of other viruses.I think it 1958 when we had the Mao or Hong Kong flue. Iwas in school and nobody knew how to treat it. Radio Pakistan kept repeating the remedy as Cinnamon tea and Aspro.. I had it and so did many of my friends .We all have had this virus in our lives, I had it while performing Hajj 13 years ago despite taking a flue shot. Corona too has its degrees of intensity.