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
What We Know So Far About Waning Vaccine Effectiveness - The New York Times
Effectiveness of COVID-19 booster vaccination strategies in partially vaccinated populations
Why do Covid boosters offer greater protection against Omicron?
COVID-19 BOOSTER VACCINE EFFECTIVENESS IN PEOPLE WITH AND WITHOUT IMMUNE DYSFUNCTION – in reducing breakthrough, duration of benefit
Effectiveness of mRNA BNT162b2 COVID-19 vaccine up to 6 months in a large integrated health system in the USA: a retrospective cohort study - The Lancet
Vaccines | Free Full-Text | Is Booster Dose Strategy Sufficient for Omicron Variant of SARS-CoV-2?
Effects of BNT162b2 Covid-19 Vaccine Booster in Long-Term Care Facilities in Israel | NEJM
Coronavirus (COVID-19) Update: FDA Shortens Interval for Booster Dose of Moderna COVID-19 Vaccine to Five Months | FDA
Protection duration after vaccination or infection, and efficacy of a third dose by vaccination or booster by infection – Swiss National COVID-19 Science Task Force
Effectiveness of Covid-19 Vaccines over a 9-Month Period in North Carolina | NEJM
Why don't COVID-19 vaccines last longer? | World Economic Forum
What We Know So Far About Waning Vaccine Effectiveness - The New York Times
Effectiveness of COVID-19 booster vaccines against COVID-19-related symptoms, hospitalization and death in England | Nature Medicine
What We Know So Far About Waning Vaccine Effectiveness - The New York Times
Comparative vaccine effectiveness against severe COVID-19 over time in US hospital administrative data: a case-control study - The Lancet Respiratory Medicine
What We Know About Getting a Second Booster Shot of COVID-19 Vaccines | The Scientist Magazine®
Boosters wane but showed protection against hospitalization during omicron, CDC study says - The Washington Post
A Bivalent Omicron-Containing Booster Vaccine against Covid-19 | NEJM
Durability of Bivalent Boosters against Omicron Subvariants | NEJM
Severity of omicron variant of concern and effectiveness of vaccine boosters against symptomatic disease in Scotland (EAVE II): a national cohort study with nested test-negative design - The Lancet Infectious Diseases
Comparative effectiveness of bivalent BA.4-5 and BA.1 mRNA booster vaccines among adults aged ≥50 years in Nordic countries: nationwide cohort study | The BMJ
Boosting with updated COVID-19 mRNA vaccines | Nature Medicine
COVID-19 Vaccine Boosters at VA Long Beach and New Website
Effectiveness of Up-to-Date COVID-19 Vaccination in Preventing SARS-CoV-2 Infection Among Nursing Home Residents — United States, November 20, 2022–January 8, 2023 | MMWR
