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
Effects of BNT162b2 Covid-19 Vaccine Booster in Long-Term Care Facilities in Israel | NEJM
How Long Does COVID Immunity Last After a Booster Shot?
Covid booster vaccines effective against severe illness from omicron, CDC says
Effectiveness of Bivalent mRNA Vaccines in Preventing Symptomatic SARS-CoV-2 Infection — Increasing Community Access to Testing Program, United States, September–November 2022 | MMWR
Vaccines | Free Full-Text | Is Booster Dose Strategy Sufficient for Omicron Variant of SARS-CoV-2?
COVID-19 Vaccines and Booster Shots: Which Combination is Most Effective? - Homage Malaysia
COVID-19 vaccine breakthrough infections | Science
Frequently asked questions and answers about Moderna COVID-19 vaccine | Bangkok Hospital
Pfizer says its COVID shots are 73 percent effective in children under 5 | PBS NewsHour
Vaccines | Free Full-Text | Efficacy of the Second COVID-19 Vaccine Booster Dose in the Elderly
Vaccines | Free Full-Text | The Four Ws of the Fourth Dose COVID-19 Vaccines: Why, Who, When and What
Rollout Strategy for the Pfizer-BioNTech COVID-19 Vaccine in Ontario - Ontario COVID-19 Science Advisory Table
Effectiveness of the second COVID-19 booster against Omicron: a large-scale cohort study in Chile | Nature Communications
Chile Study Shows Mixing Covid-19 Vaccine Boosters Highly Effective - CodeBlue
Boosters wane but showed protection against hospitalization during omicron, CDC study says - The Washington Post
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
Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials - The Lancet
Boosting immunity to Omicron | Nature Medicine
COVID-19 vaccine waning and effectiveness and side-effects of boosters: a prospective community study from the ZOE COVID Study - The Lancet Infectious Diseases
Cohort study of Covid-19 vaccine effectiveness among healthcare workers in Finland, December 2020 - October 2021 - ScienceDirect
What We Know About Getting a Second Booster Shot of COVID-19 Vaccines | The Scientist Magazine®
Safety Monitoring of COVID-19 mRNA Vaccine Second Booster Doses Among Adults Aged ≥50 Years — United States, March 29, 2022–July 10, 2022 | MMWR
What We Know So Far About Waning Vaccine Effectiveness - The New York Times
Boosting immunity to COVID-19 vaccines | Nature Medicine
