Second COVID booster shot does little to stop Omicron, study finds - Los Angeles Times
Do I Need A Fourth Dose of the COVID-19 Vaccine? - CHCCC
Do you need a 4th dose of a COVID-19 vaccine? There's no one-size-fits-all answer | CBC News
Fourth COVID vaccine shot raises resistance to serious illness for over-60s: Israel | Reuters
Pfizer Asks US to Allow 4th COVID Vaccine Dose for Seniors
Pfizer-BioNTech seek U.S. OK for second COVID booster for 65 and older | Reuters
Fourth Dose of BNT162b2 mRNA Covid-19 Vaccine in a Nationwide Setting | NEJM
COVID digest: Fourth jab 'not enough' against omicron – DW – 01/17/2022
Mixed Bag for Fourth Dose of Pfizer Vaccine vs Omicron | MedPage Today
Over 250,000 people have received 4 COVID vaccine doses -- ministry | The Times of Israel
Israel tests 4th Covid vaccine dose, awaits ministry green light
Israel Trial Suggests 4th Dose Didn't Block Omicron (1)
Nearly half of eligible Toronto residents have now received a fourth dose of COVID-19 vaccine | CTV News
So lala wirksam“: Was die vierte Covid-Impfung bringt
Pfizer and BioNTech seek authorization of second coronavirus booster shot for people 65 and older - The Washington Post
Fourth COVID Vaccine Jab Provides Little Extra Protection To Healthy Individuals - NEJM - Health Policy Watch
Corona-News am 8.2.: Coronaimpfung beschert Pfizer Umsatzsprung - DER SPIEGEL
Fourth COVID-19 vaccine dose substantially reduces mortality in the elderly
Fourth dose of COVID vaccine offers only slight boost against Omicron infection
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
German vaccines commission recommends fourth Covid jab for over-60s - The Local
Fourth COVID-19 vaccine dose boosts antibodies five-fold in Israeli study, PM says | Reuters
Pfizer-BioNTech seek EUA for fourth dose of COVID-19 vaccine for older adults
Pfizer/BioNTech seek FDA authorization for fourth Covid-19 vaccine doses for people 65 and up | CNN
