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
Pfizer CEO Says Fourth COVID-19 Shot Is 'Necessary'
Efficacy of a Fourth Dose of Covid-19 mRNA Vaccine against Omicron | NEJM
Will you need to get a 4th booster shot for the COVID-19 vaccine? | cbs8.com
Pfizer CEO says fourth dose of COVID vaccine is "necessary," submits data to FDA - CBS News
Here's Who May Need a Fourth COVID-19 Vaccine Dose
Israeli study shows 4th shot of COVID-19 vaccine less effective on Omicron | Reuters
COVID-19 booster after Omicron: Are 3rd or 4th shots necessary?
Who is eligible for a 4th COVID-19 vaccine dose? A province-by-province breakdown | CBC News
COVID 19 vaccines and transplant patients Is it safe | VCU Health
Vaccines | Free Full-Text | The Four Ws of the Fourth Dose COVID-19 Vaccines: Why, Who, When and What
Pfizer plans to submit data on a 4th Covid shot to FDA
Will Adults Need a Fourth Dose of Covid Vaccine? It's Too Soon to Know. - The New York Times
Fourth dose of COVID-19 vaccines in Israel - The Lancet Respiratory Medicine
EU members question fourth dose, except most vulnerable – EURACTIV.com
Fourth COVID-19 vaccine dose provides stronger immunity boost than third dose, shows UK study — Oxford Vaccine Group
What We Know About Getting a Second Booster Shot of COVID-19 Vaccines | The Scientist Magazine®
Omicron: Pfizer CEO says we may need fourth Covid vaccine doses sooner than expected
Should You Get a 2nd Covid Booster? - The New York Times
What to Know About a Fourth COVID-19 Dose | Time
4th COVID shot: Who will need another booster soon
Fourth Covid jab can give higher immunity than initial booster, study finds | Vaccines and immunisation | The Guardian
Is a fourth Covid vaccine dose necessary? | Science | EL PAÍS English
Updated Covid-19 boosters offer protection, but new studies suggest they don't offer an edge against Omicron | CNN
