Investigating the impact of COVID-19 vaccinations in immunocompromised adult patients
Covid-19 vaccine mixing: could heterologous boosters improve immunity?
Boosting immunity to Omicron | Nature Medicine
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
Israeli hospital begins world's first study on efficacy of 4th COVID vaccine dose | The Times of Israel
CDC recommends fourth Pfizer and Moderna Covid vaccine doses for people age 50 and older
Efficacy of a Fourth Dose of Covid-19 mRNA Vaccine against Omicron | NEJM
Instructions for the COVID-19 vaccination Booster shots (fourth dose)
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
Effectiveness of the Fourth Dose Against COVID-19: New Data | Psychology Today
Moderna CEO says fourth Covid shot may be needed, citing efficacy issue
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
4th dose for people 50 years and up: Booster protection against omicron | Nebraska Medicine Omaha, NE
COVID-19 vaccine surveillance report: week 35
Protection by a Fourth Dose of BNT162b2 against Omicron in Israel | NEJM
Japan considers 4th doses of COVID-19 vaccines | NHK WORLD-JAPAN News
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
What We Know About Getting a Second Booster Shot of COVID-19 Vaccines | The Scientist Magazine®
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
Testing fractional doses of COVID-19 vaccines | PNAS
Health-Worker Risks Of Catching Omicron Half As Likely After Fourth Dose - Second Israeli Study Challenges Earlier Results - Health Policy Watch
Immunogenicity of standard and extended dosing intervals of BNT162b2 mRNA vaccine - ScienceDirect
A fourth dose of the inactivated SARS-CoV-2 vaccine redistributes humoral immunity to the N-terminal domain | Nature Communications
