1. World Health Organization. Update on SARS-CoV-2 variant of concern omicron. Feb 2022. https://cdn.who.int/media/docs/default-source/epi-win/webinar-report-epi-win/presentation_sylvie_briand.pdf?sfvrsn=f036d40a_5.
2. Imperial College Covid-19 Response Team. Report 49: Growth, population distribution and immune escape of Omicron in England. Dec 2021. https://www.imperial.ac.uk/media/imperial-college/medicine/mrc-gida/2021-12-16-COVID19-Report-49.pdf.
3. Covid-19: Do vaccines work against omicron—and other questions answered
4. Covid-19: We have good treatments for omicron, but questions remain, say doctors
5. World Health Organization. Covid-19 weekly epidemiological update: edition 77. Feb 2022. https://www.who.int/publications/m/item/weekly-epidemiological-update-on-covid-19-1-february-2022.