All currently circulating strains of SARS-COV-2 (i.e., Delta sub-variants) have spike mutations L452R & T478K, disabling most vaccine induced antibodies, & T19R. T19R mutation disrupts epitopes in spike NTD. NTD-directed antibodies are known to cause ADE.
L452R & T478K have been mutations of concern for many months. Pfizer & Moderna had plenty of time to modify their vaccines and/or make a booster with the new spike mRNA.
The Biden-Harris regime has not demanded that. It has probably prohibited them from improving the vaccine.
via Science Defies Politics
September 9, 2021 at 05:47PM