In this thread @EricTopol describes evidence from Israel of waning anti-#SARSCoV2 immunity months after mRNA #COVID19 #vaccination.
But as I wrote https://t.co/NZk0v3r6Dc the explanation is about timing. People ARE immune, but after months response goes
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2/ ..into the B cell memory compartment, and circulating neutralizing antibody levels in blood plummet. THAT IS NORMAL with vaccines. The challenge is #DeltaVariant speed of replication is 2-3Xs faster than "normal" #SARSCoV2 so it outpaces antibody production from memory.