1. The Twins Trust. Multiple birth statistics: what is the likelihood of having twins or more? https://twinstrust.org.
2. Parents are urged to vaccinate 2-3 year olds against flu as NHS warns of “twindemic”
3. Airfinity. Covid + Flu ‘twindemic’ forecast. 29 September 2022. https://assets.ctfassets.net/poihmvxzgivq/27HxMldek8LQWUN0tjNsPY/a002241f833405e1a96b6c4f887a8803/Covid___Flu____twindemic____forecast_.pdf.
4. ONS. Coronavirus latest insights: Comparisons. 30 September 2022. www.ons.gov.uk/peoplepopulationandcommunity/healthandsocialcare/conditionsanddiseases/articles/coronaviruscovid19latestinsights/Overview.
5. Is the UK prepared for seasonal influenza in 2022–23 and beyond?