>>bit of nit-picking:
>>Those efficacy percentages are operationally defined as positive PCR test, which was main criterion set forth by FDA.
Fair point, since PCR specificity and sensitivity is under constant review.
>>At least efficiency can be guessed at by comparing monthly age bracket CFR or Covid percentage of total death # in correlation with vaccination level of age group for that time period if infection rate is high and institutions delete vaccination information like CDC did May 1. Even worse, DBs like Global.Health have gender and ethnicity field in data dict, but no list of vaccination tuples of (Vaccine / date). Yuck...
Yes, I'm interested to see latest efficiency figures for the J&J or Novavax. FWIW, Novavax uses the same traditional underlying technique as some older vaccines (e.g. Hepatitis) so may start less efficacious but end up more effective as the beastie mutates.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
