The yearly flu vaccine is either a tri or quad strain version. The makers guess every year which 3 or 4 flu types (A,B,H1N1,H5N2 ect.. Will be the most prevalent and then make that years batch with those strains. It is for this reason that people say oh the flu vaccine is only 40% blah blah. No the flu vaccine for the strain it was designed for is over 90% effective but if they guess wrong then the “vax” is not targeting the circulating strains and minimal protection is given.
Covid will be no different there will be 3 or 4 or more stains in the vaccines yearly. It will be endemic and with a death rate ten to thirty times regular influenza the need will be there for years to come.
Merc just cancelled creating a vaccine sayign that it is more effective for people to get the virus, and get over it than to vaccinate them to fight this virus- since 99.6% overall survive-
“The makers guess every year which 3 or 4 flu types (A,B,H1N1,H5N2 ect.. Will be the most prevalent”
So the eggheads are just playing guessing games year after year. That is really encouraging!