1. Effectiveness of BNT162b2 (Comirnaty, PfizerBioNTech) covid-19 booster vaccine against covid-19 related symptoms in England: test negative case-control study. https://khub.net/documents/135939561/390853656/Effectiveness+of+BNT162b2+%28Comirnaty%2C+Pfizer-BioNTech%29+COVID-19+booster+vaccine+against+covid-19+related+symptoms+in+England.docx/a366af4e-9c7f-ce86-bc58-1cb3b88e3378.
2. Covid-19: Booster doses to be offered to 30 million people in UK