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Protection of Omicron sub-lineage infection against reinfection with another Omicron sub-lineage.

Hiam ChemaitellyHoussein H AyoubPeter CoylePatrick TangHadi Mohamad YassineHebah A Al-KhatibMaria K SmattiMohammad R HasanZaina Al-KanaaniEinas Al-KuwariAndrew M JeremijenkoAnvar Hassan KaleeckalAli Nizar LatifRiyazuddin Mohammad ShaikHanan F Abdul-RahimGheyath K NasrallahMohamed Ghaith Al-KuwariAdeel Ajwad ButtHamad Eid Al-RomaihiMohamed H Al-ThaniAbdullatif Al-KhalRoberto BertolliniLaith Jamal Abu-Raddad
Published in: Nature communications (2022)
There is significant genetic distance between SARS-CoV-2 Omicron (B.1.1.529) variant BA.1 and BA.2 sub-lineages. This study investigates immune protection of infection with one sub-lineage against reinfection with the other sub-lineage in Qatar during a large BA.1 and BA.2 Omicron wave, from December 19, 2021 to March 21, 2022. Two national matched, retrospective cohort studies are conducted to estimate effectiveness of BA.1 infection against reinfection with BA.2 (N = 20,994; BA.1-against-BA.2 study), and effectiveness of BA.2 infection against reinfection with BA.1 (N = 110,315; BA.2-against-BA.1 study). Associations are estimated using Cox proportional-hazards regression models after multiple imputation to assign a sub-lineage status for cases with no sub-lineage status (using probabilities based on the test date). Effectiveness of BA.1 infection against reinfection with BA.2 is estimated at 94.2% (95% CI: 89.2-96.9%). Effectiveness of BA.2 infection against reinfection with BA.1 is estimated at 80.9% (95% CI: 73.1-86.4%). Infection with the BA.1 sub-lineage appears to induce strong, but not full immune protection against reinfection with the BA.2 sub-lineage, and vice versa, for at least several weeks after the initial infection.
Keyphrases
  • sars cov
  • single cell
  • gene expression
  • coronavirus disease
  • quality improvement
  • respiratory syndrome coronavirus