A Delta-specific version of COVID-19 vaccine has been developed months ago. Those who need a booster shot could have received it now. However, the FDA/CDC/NIH blocked its clinical trials and silenced even a discussion of it.
The current Delta strain (or serotype) of SARS-COV-2, now dominant in the US, is a far cry from the original Wuhan strain. All current vaccines target the original Wuhan strain. Both Moderna and Pfizer vaccines were developed and emergency authorized in 2020. The Delta strain is the result of the coronavirus evolving to evade limited immunity conferred by those vaccines.
The neutralizing effect of the antibodies elicited by the 2020 vaccines is 6-8x lower against the Delta than against the original Wuhan strain 1, 2. The higher replication rates of the Delta strain/serotype decrease vaccine effectiveness even further.
Thus, the original 2020 vaccines were not designed, and are not effective (except for few months as prophylaxis) against the current Delta strain / serotype. All the dangers and harms remain or become worse. Continue reading Suppression of the Delta-Specific Vaccine