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.
The Centers for Disease Control and Prevention altered its mask guidance after a report found the Delta COVID-19 variant spreads as easily as chickenpox, possibly even among the vaccinated — but critics have ripped it as misleading and based on weak data.
A new study has found that COVID-19 vaccines may be somewhat vulnerable to the California “Epsilon” strain of virus.
The variant has three spike protein mutations...
