1. Moderna. Moderna announces clinical update on bivalent covid-19 booster platform. 19 Apr 2022. https://investors.modernatx.com/news/news-details/2022/Moderna-Announces-Clinical-Update-on-Bivalent-COVID-19-Booster-Platform/default.aspx
2. Manchester University NHS Foundation Trust. Early data for multivariant COVID-19 vaccine booster shows promise. 6 Jan 2022. https://mft.nhs.uk/2022/01/06/early-data-for-multivariant-covid-19-vaccine-booster-shows-promise/
3. Brierley C. Cambridge coronavirus vaccine enters clinical trial. University of Cambridge. 14 Dec 2021. https://www.cam.ac.uk/stories/DIOSCoVax_safetytrial
4. The BMJ Interview: WHO chief scientist optimistic for a pan-coronavirus vaccine in two years