If anybody didn’t watch the Netflix documentary:  Pandemic  Please give it a watch, it is good.  Really makes you appreciate the scientists and what they do to stay ahead of influenza etc.  This gentleman and his team are featured in the documentary and claim they will have a vaccine for ALL influenza in less than five years with only one shot needed.  The documentary alludes that they could do it now with multiple shots.  I would sit in a chair all day and take shots if it staved off flu forever.  Looks like their work is progressing with Covid19 also.