Prof. Christina Pagel. (2021, December 23). UKHSA surveillance report shows reinfections rising sharply as Omicron takes hold https://t.co/UGArY4sbOA [Tweet]. @chrischirp. https://twitter.com/chrischirp/status/1474041921249189896

ReconfigBehSci. (2022, March 11). RT @dgurdasani1: UKHSA tech report out—TL;DR: -BA.2 now represents >80% of omicron in England -Growth rate 80% greater relative to BA.1 p… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1502598815081275393

Cornelius Roemer. (2022, February 12). Fantastic work by @UKHSA comparing serial intervals of BA.1, BA.2 and Delta as published in the most recent technical briefing. BA.2 seems to have even shorter serial interval than BA.1 This could help explain different relative growth rates of BA.2 vs BA.1 in different countries https://t.co/Gch94Ew8CX [Tweet]. @CorneliusRoemer. https://twitter.com/CorneliusRoemer/status/1492434232664375304

Theo Sanderson. (2021, December 8). SGTF Regional data to Dec 6 from https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1039470/Omicron_SGTF_case_update.pdf (Last data point would be expected to be incomplete based on the dates and so to slightly understate growth. And also will already have moved substantially from the midpoint of that last week on 3rd Dec.) https://t.co/1L6tM0sXIZ [Tweet]. @theosanderson. https://twitter.com/theosanderson/status/1468648673668128775

Omicron cases may be far higher than currently confirmed, variant marker analysis reveals. (2021, December 8). Inews.Co.Uk. https://inews.co.uk/news/health/omicron-covid-cases-may-be-seven-times-higher-than-confirmed-1341156

COVID-19 vaccine surveillance report—Week 47. (n.d.). 46.

Mahase, E. (2021). Covid-19: Vaccine uptake during pregnancy has increased but deprived areas lag behind, data show. BMJ, 375, n2932. https://doi.org/10.1136/bmj.n2932

Delta ‘Plus’ Covid variant may be more transmissible. (2021, October 22). BBC News. https://www.bbc.com/news/health-59009293