1. Covid-19: Pfizer vaccine efficacy was 52% after first dose and 95% after second dose, paper shows
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4. Philpotts E . GP networks forced to pull out of delivering Pfizer vaccine due to new guidance. Pulse. December 2020. www.pulsetoday.co.uk/news/clinical-areas/immunology-and-vaccines/gp-networks-forced-to-pull-out-of-delivering-pfizer-vaccine-due-to-new-guidance.
5. Covid-19: People with history of significant allergic reactions should not receive Pfizer vaccine, says regulator