@Pr. NoNo l’IgNoble et Dr. Watson
 

comme l’immunité cellulaire est inexistante la protection disparait ou est insuffisante pour éviter une contamination au bout de quelques semaines ... statistiquement 6 mois ou 24 semaines ... suivant les individus c’est parfois plus parfois moins ...

du coup, quand la contamination ou la dernière dose remonte à plus de 6 mois chacun a des chances substantielles d’être réinfecté ...
de plus les nouvelles mutations omicron grâce à leur échappement immunitaire diminuent l’efficacité des vaccins actuellement sur le marché ...
c’est comme ça ... dans la mesure où on sait pas comment on pourrait stimuler l’immunité cellulaire personne n’y peut rien ...

ce sont des faits ... tangibles ... avérés ... scientifiques !

Effectiveness of primary infection against severe, critical, or fatal COVID-19 reinfection was 97.3% (95% CI : 94.9- 98.6%), irrespective of the variant of primary infection or reinfection, and with no evidence for waning. Similar results were found in sub-group analyses for those ≥50 years of age.

effectiveness of pre-Omicron primary infection against pre-Omicron reinfection was 85.5% (95% CI : 84.8-86.2%). Effectiveness peaked at 90.5% (95% CI : 88.4-92.3%) in the 7th month after the primary infection, but waned to 70% by the 16th month. Extrapolating this waning trend using a Gompertz curve suggested an effectiveness of 50% in the 22nd month and <10% by the 32nd month. Effectiveness of pre-Omicron primary infection against Omicron reinfection was 38.1% (95% CI : 36.3-39.8%) and declined with time since primary infection. A Gompertz curve suggested an effectiveness of <10% by the 15th month. Effectiveness of primary infection against severe, critical, or fatal COVID-19 reinfection was 97.3% (95% CI : 94.9-98.6%), irrespective of the variant of primary infection or reinfection, and with no evidence for waning. Similar results were found in sub-group analyses for those ≥50 years of age

“Overall, we found that breakthrough infections with the BA.5 subvariant were less likely among persons with a previous SARS-CoV-2 infection history in a highly vaccinated population, especially for previous BA.1 or BA.2 infection, than among uninfected persons.”

In contrast to vaccine-induced immunity, there was no increased risk for re-infection with Beta, Gamma or Delta variants relative to Alpha variant in individuals with infection-induced immunity

 
150 Plus Research Studies Affirm Naturally Acquired Immunity to Covid-19 : Documented, Linked, and Quoted