[kuhewa]

>Arguably, traditional dead-virus vaccines might provide better long-term protection for this reason, but we went all-in on the new tech.

That argument sounds good in theory, but we have data we can look at to assess — Sinovac is inactivated virus and it's efficacy was 50% against the early strains. Also, work has shown that spike antigen vaccines broaden the range of antibodies produced by previously infected immune system to increase neutralisation against later variants, even though the vaccines were of course based on ancestral spike protein sequence..