SARS-CoV-2 omicron variant: epidemiological features, biological characteristics, and clinical significance

Y Guo, J Han, Y Zhang, J He, W Yu, X Zhang… - Frontiers in …, 2022 - frontiersin.org
The SARS-CoV-2 Omicron (B. 1.1529) variant was designated as a variant of concern (VOC)
by the World Health Organization (WHO) on November 26, 2021. Within two months, it had …

The outbreak of SARS‐CoV‐2 Omicron lineages, immune escape, and vaccine effectivity

Y Zhou, H Zhi, Y Teng - Journal of medical virology, 2023 - Wiley Online Library
As of November 2021, several SARS‐CoV‐2 variants appeared and became dominant
epidemic strains in many countries, including five variants of concern (VOCs) Alpha, Beta …

Evaluation of waning of SARS-CoV-2 vaccine–induced immunity: a systematic review and meta-analysis

F Menegale, M Manica, A Zardini, G Guzzetta… - JAMA Network …, 2023 - jamanetwork.com
Importance Estimates of the rate of waning of vaccine effectiveness (VE) against COVID-19
are key to assess population levels of protection and future needs for booster doses to face …

Real-world COVID-19 vaccine effectiveness against the Omicron BA. 2 variant in a SARS-CoV-2 infection-naive population

JJ Lau, SMS Cheng, K Leung, CK Lee, A Hachim… - Nature medicine, 2023 - nature.com
Abstract The SARS-CoV-2 Omicron variant has demonstrated enhanced transmissibility and
escape of vaccine-derived immunity. Although first-generation vaccines remain effective …

Effects of previous infection and vaccination on symptomatic omicron infections

HN Altarawneh, H Chemaitelly, HH Ayoub… - … England Journal of …, 2022 - Mass Medical Soc
Background The protection conferred by natural immunity, vaccination, and both against
symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with …

Long-term effectiveness of COVID-19 vaccines against infections, hospitalisations, and mortality in adults: findings from a rapid living systematic evidence synthesis …

N Wu, K Joyal-Desmarais, PAB Ribeiro… - The Lancet …, 2023 - thelancet.com
Background Synthesising evidence on the long-term vaccine effectiveness of COVID-19
vaccines (BNT162b2 [Pfizer–BioNTech], mRNA-1273 [Moderna], ChAdOx1 nCoV-19 …

[HTML][HTML] Vaccine effectiveness of one, two, and three doses of BNT162b2 and CoronaVac against COVID-19 in Hong Kong: a population-based observational study

ME McMenamin, J Nealon, Y Lin, JY Wong… - The Lancet Infectious …, 2022 - thelancet.com
Summary Background Hong Kong maintained low circulation of SARS-CoV-2 until a major
community epidemic of the omicron (B. 1.1. 529) sublineage BA. 2 began in January, 2022 …

Effectiveness of mRNA-1273 vaccination against SARS-CoV-2 omicron subvariants BA. 1, BA. 2, BA. 2.12. 1, BA. 4, and BA. 5

HF Tseng, BK Ackerson, KJ Bruxvoort, LS Sy… - Nature …, 2023 - nature.com
Studies have reported reduced natural SARS-CoV-2 infection-and vaccine-induced
neutralization against omicron BA. 4/BA. 5 compared with earlier omicron subvariants. This …

Durability of booster mRNA vaccine against SARS-CoV-2 BA. 2.12. 1, BA. 4, and BA. 5 subvariants

P Qu, JN Faraone, JP Evans, YM Zheng… - … England Journal of …, 2022 - Mass Medical Soc
Immunity against Omicron Variants after Vaccine Boost After a third (booster) dose of SARS-
CoV-2 vaccine, immunity waned more slowly than after two doses and even more slowly in …

[HTML][HTML] Effectiveness of 2, 3, and 4 COVID-19 mRNA vaccine doses among immunocompetent adults during periods when SARS-CoV-2 Omicron BA. 1 and BA. 2/BA …

R Link-Gelles - MMWR. Morbidity and mortality weekly report, 2022 - cdc.gov
Effectiveness of 2, 3, and 4 COVID-19 mRNA Vaccine Doses Among Immunocompetent Adults
During Periods when SARS-CoV-2 Omicron BA.1 and BA.2/BA.2.12.1 Sublineages …