Testing fractional doses of COVID-19 vaccines | PNAS
Most Immunocompromised People Have Gotten the 4th COVID-19 Vaccine Dose
Investigating the impact of COVID-19 vaccinations in immunocompromised adult patients
4th dose for people 50 years and up: Booster protection against omicron | Nebraska Medicine Omaha, NE
Immunogenicity of 4th dose mRNA COVID vaccines and its implications on vaccine efficacy against omicron variant of concern
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
Israeli hospital begins world's first study on efficacy of 4th COVID vaccine dose | The Times of Israel
What a 4th COVID shot can do for you — and what it can't | CBC News
Effectiveness of a fourth dose of mRNA COVID-19 vaccine against all-cause mortality in long-term care facility residents and in the oldest old: A nationwide, retrospective cohort study in Sweden - The Lancet
Short term, relative effectiveness of four doses versus three doses of BNT162b2 vaccine in people aged 60 years and older in Israel: retrospective, test negative, case-control study | The BMJ
Six-Month Follow-up after a Fourth BNT162b2 Vaccine Dose | NEJM
Instructions for the COVID-19 vaccination Booster shots (fourth dose)
CDC recommends fourth Pfizer and Moderna Covid vaccine doses for people age 50 and older
Effectiveness of heterologous third and fourth dose COVID-19 vaccine schedules for SARS-CoV-2 infection during delta and omicron predominance in Thailand: a test-negative, case-control study - The Lancet Regional Health - Southeast Asia
Health-Worker Risks Of Catching Omicron Half As Likely After Fourth Dose - Second Israeli Study Challenges Earlier Results - Health Policy Watch
Protection by a third and fourth dose of vaccine against COVID-19 among persons aged 65 years and older – Based on Swedish data from February to August 2022 — Folkhälsomyndigheten
Effectiveness of a fourth dose of mRNA COVID-19 vaccine against all-cause mortality in long-term care facility residents and in the oldest old: A nationwide, retrospective cohort study in Sweden - The Lancet
Immunogenicity of 4th dose mRNA COVID vaccines and its implications on vaccine efficacy against omicron variant of concern
A fourth dose of the inactivated SARS-CoV-2 vaccine redistributes humoral immunity to the N-terminal domain | Nature Communications
Effectiveness of a fourth dose of mRNA COVID-19 vaccine against all-cause mortality in long-term care facility residents and in the oldest old: A nationwide, retrospective cohort study in Sweden - The Lancet
mRNA-1273 COVID-19 vaccine effectiveness against the B.1.1.7 and B.1.351 variants and severe COVID-19 disease in Qatar | Nature Medicine
COVID-19 vaccine surveillance report: week 35
Covid-19 vaccine mixing: could heterologous boosters improve immunity?
Effectiveness of the Fourth Dose Against COVID-19: New Data | Psychology Today
