CDC Reveals Natural Immunity Acquired Through Previous Infection of COVID-19 Provides More Protection than Vaccines

CDC Reveals Natural Immunity Acquired Through Previous Infection of COVID-19 Provides More Protection than Vaccines

Finally, the science is catching up with the COVID hysteria showing natural immunity is effective in helping to prevent infections.

On Wednesday, November 10, 2021, An Israeli study showed natural immunity delivers 13 times more protection than COVID vaccines

On Wednesday, January 19, 2021, The Disease Control and Prevention (CDC) revealed that unvaccinated people who recovered from COVID-19 were better protected than those who were vaccinated and not previously infected during the recent delta surge.

The researchers evaluated the data from 1.1 million Covid-19 cases among adults in California and New York (which account for 18% of the U.S. population) from May 30 to Nov. 20, 2021.

The study was divided into four groups of adults aged 18 above: 1) unvaccinated with no previous laboratory-confirmed COVID-19 diagnosis, 2) unvaccinated with a previous COVID-19 diagnosis, 3) vaccinated (14 days) with no previous COVID-19 diagnosis, and 4) vaccinated with a previous COVID-19 diagnosis.

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According to the study, during May–November 2021, case and hospitalization rates were highest among individuals who were unvaccinated without a previous diagnosis.

“Before Delta became the predominant variant in June, case rates were higher among persons who survived a previous infection than persons who were vaccinated alone. By early October, persons who survived a previous infection had lower case rates than persons who were vaccinated alone,” the study stated. (See graph below)

Via CDC:


In the pre-Delta period during June 13–June 26, for example, compared with hospitalization rates among unvaccinated persons without a previous COVID-19 diagnosis, hospitalization rates were 27.7-fold lower (95% CI = 22.4–33.0) among vaccinated persons without a previous COVID-19 diagnosis, 6.0-fold lower (95% CI = 3.3–8.7) among unvaccinated persons with a previous COVID-19 diagnosis, and 7.1-fold lower (95% CI = 4.0–10.3) among vaccinated persons with a previous COVID-19 diagnosis. However, this pattern also shifted as the Delta variant became predominant. During October 3–16, compared with hospitalization rates among unvaccinated persons without a previous COVID-19 diagnosis, hospitalization rates were 19.8-fold lower (95% CI = 18.2–21.4) among vaccinated persons without a previous COVID-19 diagnosis, 55.3-fold lower (95% CI = 27.3–83.3) among unvaccinated persons with a previous COVID-19 diagnosis, and 57.5-fold lower (95% CI = 29.2–85.8) among vaccinated persons with a previous COVID-19 diagnosis.

Among the two cohorts with a previous COVID-19 diagnosis, no consistent incidence gradient by time since the previous diagnosis was observed (Supplementary Figure 3, https://stacks.cdc.gov/view/cdc/113253). When the vaccinated cohorts were stratified by the vaccine product received, among vaccinated persons without a previous COVID-19 diagnosis, the highest incidences were observed among persons receiving the Janssen (Johnson & Johnson), followed by Pfizer-BioNTech, then Moderna vaccines (Supplementary Figure 4, https://stacks.cdc.gov/view/cdc/113253). No pattern by product was observed among vaccinated persons with a previous COVID-19 diagnosis.

“When looking at the summer and fall of 2021, when Delta became predominant in this country, however, surviving a previous infection now provided greater protection,” CDC epidemiologist Benjamin Silk said.

Written By: Eric Thompson, host of the Eric Thompson Show.



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