Thread by @FLLymeDisease

What happened to #FollowTheScience? Global data/research confirm #NaturalImmunity is robust & their is no discernable benefit beyond antibody production. Those with past #COVID infection are at very little risk of reinfection, hospitalization, or death. 1/

https://twitter.com/CDCgov/status/1374812266567241729

Recommending #COVID19 vax even if you've had #COVID is #AntiScience. @ClevelandClinic found not 1/1359 previously infected subjects who remained unvaccinated were reinfected. Those w/ prior infection "are unlikely to benefit from COVID-19 vaccination" medrxiv.org/content/10.110… 2/

#Naturalmmunity against #COVID-19 in #India significantly reduces the risk of reinfection: findings from a cohort of sero-survey participants - only 3/1170 were reinfected w/ 1 hospitalization (but didn't require O2 support or critical care medrxiv.org/content/10.110… 3/

From @EmoryUniversity: results suggest that broad and effective immunity may persist long-term in recovered #COVID-19 patients cell.com/cell-reports-m… #NaturalImmunity 4/

From the #UK: "We estimated antibody levels associated with protection against reinfection likely last 1.5-2 years on average, with levels associated with protection from severe infection present for several years." medrxiv.org/content/10.110… 5/

There is early evidence that #NaturalImmunity also protects against #GammaVariant: Attack rate was 15/25 in fully vaccinated, 6/15 in those partially vaccinated and 0/6 among persons with a previous history of #COVID-19 wwwnc.cdc.gov/eid/article/27… 6/

From @UCLA: Previous infection & vaccination for #COVID were associated with decreased risk for infection or re-infection in a routinely screened workforce. The was no difference between vaccinated individuals and individuals with #NaturalImmunity medrxiv.org/content/10.110… 7/

#Qatar: The relative risk for PCR positivity was essentially the same for vaccinated vs. #NaturalImmunity (0.22 for vaccinated individuals and 0.26 for individuals with prior infection compared with no record of vaccination or prior infection). jamanetwork.com/journals/jama/… 8/

#NaturalImmunity has also been found to protect those with prior mild infection. In #NIH funded study, researchers found "results indicate that mild infection with SARS-CoV-2 induces robust antigen-specific, long-lived humoral immune memory in humans." nature.com/articles/s4158… 9/

#WHO: Studies aimed to detect immunological memory including B cells, & CD4+ & CD8+ T cells, observed robust immunity at 6 months post-infection in 95% of subjects under study, including individuals with asymptomatic, mild, moderate & severe infections apps.who.int/iris/bitstream… 10/

From @Cornell: SARS-CoV-2 antibody-positivity protects against reinfection for at least seven months with 95% efficacy. Reinfections were less severe than primary infections. #NaturalImmunity thelancet.com/journals/eclin… 11/

#Israel: Protection of previous #COVID infection is estimated at 94·8%; hospitalization 94·1%; severe illness 96·4%. Results "question need to vaccinate previously-infected individuals." #NaturalImmunity medrxiv.org/content/10.110… 12/