A last word of caution to all those pretending the Covid-19 pandemic is toning down….

A last word of caution to all those pretending the Covid-19 pandemic is toning down….

Note that views expressed in this opinion article are the writer’s personal views and not necessarily those of TrialSite.

Synopsis

The current expansion in prevalence of infectious Sars-CoV-2 variants is highly problematic because it erodes natural Ab-based, variant-nonspecific immunity in the non-vaccinated part of the population. The high infectivity rate that results from this expansion not only further enhances the expansion of these variants but may also drive natural selection of viral variants that are featured by an even higher level of infectiousness. Erosion, therefore, of natural Ab-based, variant-nonspecific immunity promotes breeding and transmission of more infectious viral variants in the non-vaccinated part of the population. On the other hand, mass vaccination promotes natural selection of increasingly vaccine immunity (VI)-escaping variants in the vaccinated part of the population. Taken together, mass vaccination conducted on a background of high infectivity rates enables more infectious, increasingly VI-escaping variants to expand in prevalence. This evolution inevitably results in inclining morbidity rates in both, the non-vaccinated and vaccinated popul...

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