QROT-200: Flu Vaccine Detail. At Most Only Half Strains Are Current Years!

From Tenpenny's "Zero Accountability in a Failed System" (I mispronounced her name in the episode)Only three or four strains are selected in the educated guess of which will be most prevalent. But to get a head start usually TWO are not even those found for that flu season! They're instead from the previous year! But wait! The new ones selected are not even the pure basis for the strain the vaccine creates immunity for! That's because since they're not sure how well it will replicate in chicken embryos they combine it with another virus which they know replicates well in eggs. So the new strain in the vaccine is a mixed virus, NOT the one identified.