Effectiveness of BNT162b2 Vaccine against Omicron Variant in South Africa | NEJM
FDA vaccine advisers 'disappointed' and 'angry' that early data about new Covid-19 booster shot wasn't presented for review last year | CNN
Bivalent Booster Is Effective, First Real-World Data Show | Time
COVID-19 vaccine effectiveness against the omicron (BA.2) variant in England - The Lancet Infectious Diseases
How booster shots can help protect you from Omicron | National Geographic
Effectiveness of Bivalent mRNA Vaccines in Preventing Symptomatic SARS-CoV-2 Infection — Increasing Community Access to Testing Program, United States, September–November 2022 | MMWR
Efficacy of a Fourth Dose of Covid-19 mRNA Vaccine against Omicron | NEJM
Pfizer says its COVID shots are 73 percent effective in children under 5 | PBS NewsHour
Coronavirus (COVID-19) Update: FDA Takes Multiple Actions to Expand Use of Pfizer-BioNTech COVID-19 Vaccine | FDA
Pfizer, BioNTech say bivalent COVID-19 booster shot performs better against BA.5 omicron subvariant - ABC News
Covid booster vaccines effective against severe illness from omicron, CDC says
Effectiveness of a COVID-19 Additional Primary or Booster Vaccine Dose in Preventing SARS-CoV-2 Infection Among Nursing Home Residents During Widespread Circulation of the Omicron Variant — United States, February 14–March 27, 2022 | MMWR
Vaccines and Boosters Offer Best Defense Against Omicron
Vaccines appear weak at blocking Omicron, better against severe disease | Reuters
Why do Covid boosters offer greater protection against Omicron?
Omicron: Three vaccine doses key for protection against variant - BBC News
Updated COVID-19 booster targets subvariants responsible for 98% of cases today : Oregon Health News Blog
Pfizer-BioNTech Covid-19 shot loses power against Omicron variant
Andy Larsen: How well does the vaccine work against omicron? Here's the real-world data.
How effective are COVID-19 vaccines against omicron? | PBS NewsHour
Effectiveness of an inactivated Covid-19 vaccine with homologous and heterologous boosters against Omicron in Brazil | Nature Communications
Effectiveness of Covid-19 Vaccines against the Omicron Variant | NEJM
Covid booster vaccines effective against severe illness from omicron, CDC says
