A second large Israeli study has found that natural immunity provides better protection against infection than the Pfizer vaccine. Adjusting for several factors, infections were six times higher among the vaccinated.

Many countries are currently experiencing a wave of COVID-19 “breakthrough cases” in spite of high vaccination rates. We explain the fundamental reason why such cases had to be expected: the antibodies induced by intramuscular vaccination will only circulate in the bloodstream, but they will not reach the surface of the mucous membranes in the upper airways. We also briefly discuss possible mechanisms of vaccine-induced immunopathology.

Background Immune protection following either vaccination or infection with SARS-CoV-2 decreases over time. Objective To determine the kinetics of SARS-CoV-2 IgG antibodies following administration of two doses of BNT162b2 vaccine, or SARS-CoV-2 infection in unvaccinated individuals. Methods Antibody titers were measured between January 31, 2021, and July 31, 2021 in two mutually exclusive groups: i) vaccinated individuals who received two doses of BNT162b2 vaccine and had no history of previous infection with COVID-19 and ii) SARS-CoV-2 convalescents who had not received the vaccine. Results A total of 2,653 individuals fully vaccinated by two doses of vaccine during the study period and 4,361 convalescent patients were included. Higher SARS-CoV-2 IgG antibody titers were observed in vaccinated individuals (median 1581 AU/mL IQR [533.8-5644.6]) after the second vaccination, than in convalescent individuals (median 355.3 AU/mL IQR [141.2-998.7]; p<0.001). In vaccinated subjects, antibody titers decreased by up to 40% each subsequent month while in convalescents they decreased by less than 5% per month. Six months after BNT162b2 vaccination 16.1% subjects had antibody levels below the seropositivity threshold of <50 AU/mL, while only 10.8% of convalescent patients were below <50 AU/mL threshold after 9 months from SARS-CoV-2 infection. Conclusions This study demonstrates individuals who received the Pfizer-BioNTech mRNA vaccine have different kinetics of antibody levels compared to patients who had been infected with the SARS-CoV-2 virus, with higher initial levels but a much faster exponential decrease in the first group.

This follow-up chart is a list of 91 scientific studies and evidence on natural immunity to allow you to draw your own conclusions..

In the USA and Germany, high-level officials have used the term pandemic of the unvaccinated, suggesting that people who have been vaccinated are not relevant in the epidemiology of COVID-19. Officials’ use of this phrase might have encouraged one scientist to claim that “the unvaccinated threaten the vaccinated for COVID-19”.1 But this view is far too simple.

The CDC says research from California and New York before Omicron’s spread showed unvaccinated people without previous infection faced the greatest risk.

People who had previously been infected with COVID-19 were better protected against the Delta variant than those who were vaccinated alone, suggesting that natural immunity was a more potent shield than vaccines against that variant, California and New York health officials reported on Wednesday.

Was it determined if the immunity was gained through taking the flu vaccine?