@55b3f2a1 As I remember, it was to be one shot - then it didn't work and they said 2 shots - then it didn't work and they said "boosters" 1, 2, 3, 4  and so-on. As far as I can tell, it just DOESN'T WORK. If it does help, it's temporary and not worth the side effects. As many have said since the beginning, it is at best a TREATMENT, not a vaccine.