Johns Hopkins Study: 99% Of All Covid Prior Infections Resulted In ‘Natural Immunity’ That Lasted At Least 650 Days
Johns Hopkins university this week dropped a quiet bombshell of a study ( Alejo JL, Mitchell J, Chang A, et al. Prevalence and Durability of SARS-CoV-2 Antibodies Among Unvaccinated US Adults by History of COVID-19. JAMA. Published 3 Feb 2022. doi:10.1001/jama.2022.1393) that went widely ignored in the mainstream media.
Dr. Marty Makary, spearheading a team at Johns Hopkins to do the work that the CDC and NIH refuse to do, showed that 99% of unvaccinated people known to have Covid infections had robust "natural immunity" that did not diminish for at least 650 days.
Of 1580 individuals invited to undergo serologic testing, 816 (52%) did so between September 24, 2021, and November 5, 2021. Participants had a mean age of 48.0 years, 421 (52%) were women, and 669 (82%) were White (Table). Fourteen percent reported routine mask use in public. Anti-RBD and anti-N antibody presence/absence were correlated (95%; Cohen κ=0.908).
Among 295 reported COVID-confirmed participants, 293 (99%) tested positive for anti-RBD antibodies (≥250 U/mL, 44%; ≥500 U/mL, 27%; ≥1000 U/mL, 15%). A median of 8.7 (IQR, 1.9-12.9; range, 0-20) months passed since reported COVID-19 diagnosis. The median anti-RBD level among those who tested positive was 205 (IQR, 61-535) U/mL. There was no evidence of association between time after infection and antibody titer (0.8% increase [95% CI, -2.4% to 4.2%] per month, P = .62) (Figure).
Among 275 reported COVID-unconfirmed participants, 152 (55%) tested positive for anti-RBD antibodies (≥250 U/mL, 18%; ≥500 U/mL, 12%; ≥1000 U/mL, 6%). The median level among those who tested positive was 131 (IQR, 35-402) U/mL.
Among 246 reported no-COVID participants, 11% tested positive for anti-RBD antibodies (≥250 U/mL, 2%; ≥500 U/mL, 2%; ≥1000 U/mL, 2%). The median level among those who tested positive was 82 (IQR, 19-172) U/mL.
The charts included in the study reveal the story. As you can see, for three different types of important antibodies, about 95% of people with prior infections retained all three. 99% had the anti-RBD positive type of antibody.
Most importantly of all, this is clear indisputable evidence that natural immunity is far more durable than vaccinated immunity: The Covid protection lasted for 650 days with no noticeable decline ...