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2026-09-22 05:27:04 UTC

Greg Egan on Nostr: I just had the pneumococcus vaccine [free for people 65+ in Australia]. It contains ...

I just had the pneumococcus vaccine [free for people 65+ in Australia].

It contains sugars from 21 types of pneumococcus, linked to CRM197 — a version of diphtheria toxin that is highly immunogenic, but rendered non-toxic by a single mutation, altering just 1 of 535 amino acids.