Keywords omicron

Update on SARS CoV-2 Variant BA.2.86 (NEW 9/13, Website, Regulatory)

CDC

30 August 2023

CDC is tracking a new SARS-CoV-2 variant called BA.2.86 (Pirola) and working to better understand its potential impact on public health.

keywords: BA.2.86, covid-19, omicron, Pirola, variants

Effectiveness of Monovalent mRNA COVID-19 Vaccination in Preventing COVID-19–Associated Invasive Mechanical Ventilation and Death Among Immunocompetent Adults During the Omicron Variant Period — IVY Network, 19 U.S. States, February 1, 2022–January 31, 2023

CDC/MMWR

28 April 2023

DeCuir J, Surie D, Zhu Y, et al.

keywords: covid-19, monovalent vaccine, omicron, vaccines

Early Estimates of Bivalent mRNA Booster Dose Vaccine Effectiveness in Preventing Symptomatic SARS-CoV-2 Infection Attributable to Omicron BA.5– and XBB/XBB.1.5–Related Sublineages Among Immunocompetent Adults — Increasing Community Access to Testing Program, United States, December 2022–January 2023 (Website, Regulatory)

CDC/MMWR

3 February 2023

Link-Gelles R, Ciesla AA, Roper LE, et al.

keywords: covid-19, mRNA, omicron, vaccines

SARS-CoV-2 Omicron is an immune escape variant with an altered cell entry pathway (Website, Publication)

Nature Microbiology

7 July 2022

Willett BJ, Grove J, MacLean OA et al.

This study shows evasion of neutralization by Omicron BA.1 and BA.2 variants in vitro using sera from individuals vaccinated with ChAdOx1, BNT162b2 and mRNA-1273.

keywords: covid-19, omicron, transmission

Waning 2-Dose and 3-Dose Effectiveness of mRNA Vaccines Against COVID-19–Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Adults During Periods of Delta and Omicron Variant Predominance — VISION Network, 10 States, August 2021–January 2022 (Website, Publication)

CDC/MMWR

18 February 2022

Ferdinands JM, Rao S, Dixon BE, et al.

keywords: covid-19, Delta, mRNA, omicron

Effectiveness of COVID-19 Pfizer-BioNTech BNT162b2 mRNA Vaccination in Preventing COVID-19–Associated Emergency Department and Urgent Care Encounters and Hospitalizations Among Nonimmunocompromised Children and Adolescents Aged 5–17 Years — VISION Network, 10 States, April 2021–January 2022 (Website, Publication)

CDC/MMWR

18 December 2021

Klein NP, Stockwell MS, Demarco M, et al.
Two doses protect against COVID-19–associated emergency department and urgent care encounters among children and adolescents. However, vaccine effectiveness (VE) was lower during Omicron predominance and decreased with time since vaccination; a booster dose restored VE to 81% among adolescents aged 16–17 years. Overall, 2-dose VE against COVID-19–associated hospitalization was 73%–94%.

keywords: covid-19, omicron, vaccines

Take a look at SARS-CoV-2's family tree. It's full of surprises (Website, News)

NPR

9 February 2022

keywords: covid-19, Delta, omicron, variants

SARS-CoV-2 Infection and Hospitalization Among Adults Aged ≥18 Years, by Vaccination Status, Before and During SARS-CoV-2 B.1.1.529 (Omicron) Variant Predominance — Los Angeles County, California, November 7, 2021–January 8, 2022 (Website, Publication)

CDC

4 February 2022

Danza P, Koo TH, Haddix M, et al.

Omicron summary relative to infection and hospitalization of adults.

keywords: covid-19, Delta, omicron, variants

HKUMed finds Omicron SARS-CoV-2 can infect faster and better than Delta in human bronchus but with less severe infection in lung