Pfizer says its COVID shots are 73 percent effective in children under 5 | PBS NewsHour
Moderna says its COVID-19 shot 93% effective six months after second dose | Reuters
How Long Does COVID Immunity Last After a Booster Shot?
Frontiers | Association Between Risk Perception and Acceptance for a Booster Dose of COVID-19 Vaccine to Children Among Child Caregivers in China
Boosting immunity to COVID-19 vaccines | Nature Medicine
Rollout Strategy for the Pfizer-BioNTech COVID-19 Vaccine in Ontario - Ontario COVID-19 Science Advisory Table
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
A Bivalent Omicron-Containing Booster Vaccine against Covid-19 | NEJM
Effectiveness of a second BNT162b2 booster vaccine against hospitalization and death from COVID-19 in adults aged over 60 years | Nature Medicine
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
Booster and Additional Primary Dose COVID-19 Vaccinations Among Adults Aged ≥65 Years — United States, August 13, 2021–November 19, 2021 | MMWR
Cohort study of Covid-19 vaccine effectiveness among healthcare workers in Finland, December 2020 - October 2021 - ScienceDirect
Effectiveness of a third dose of the BNT162b2 mRNA COVID-19 vaccine for preventing severe outcomes in Israel: an observational study - The Lancet
Efficacy of a Fourth Dose of Covid-19 mRNA Vaccine against Omicron | NEJM
I'm a physician over age 50 and I'm not getting my second COVID booster yet. Here's why. | Opinion
Boosting immunity to Omicron | Nature Medicine
Effectiveness of a fourth dose of covid-19 mRNA vaccine against the omicron variant among long term care residents in Ontario, Canada: test negative design study | The BMJ
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
Covid booster vaccines effective against severe illness from omicron, CDC says
Why are Covid vaccine boosters needed and who in the UK will receive them?
Why do Covid boosters offer greater protection against Omicron?