Progression of COVID-19 in six South American countries with different vaccination coverage

COVID-19 seems to have progressed under two general assumptions: a) every new variant of SARS-Co V-2 should bear the worst consequences, thus justifying extension government-mandated lock-downs, school and border closures, face mask wearing other restrictive measures b) that hastily developed experimental vaccines employing novel technologies would quickly efficiently stop pandemic by protecting from infection or, at very least, preventing complications death. We tested these hypotheses analyzing epidemiological data officially released governments six countries in South America. found vaccination failed prevent contagion Omicron or previous variants V-2. Mortality has decreased with time since start global early 2020 showing lowest mortality date. This finding cursorily agreed a beneficial effect each individual country but when similar mortalities different rates were analyzed. Thus, slight continued reduction through duration sharp decrease do not correlate level national among studied. A more plausible explanation for is natural attenuation successive passage millions susceptible healthy hosts, as dictated well-established principles virology, immunology, vaccinology dating least mid 1950’s. The failure substantially reduce reported here raise questions about value massive campaigns America, particularly, considering potential risks adverse reactions (still be fully determined) considerable cost stressed economies region.