As COVID — especially the Delta variant — surges among the fully vaccinated, Brian Hooker, Ph.D., said the more the variant deviates from the original sequence used for the vaccine, the less effective the vaccine will be on that variant.
A professor at the renowned Johns Hopkins School of Medicine advised Americans recently to "ignore" guidance from the U.S. Centers for Disease Control and Prevention due to the public health agency's puzzling refusal to recognize natural immunity from previous infection.
