1. Center for Systems Science and Engineering at Johns Hopkins University. COVID-19 Dashboard. https://www.arcgis.com/apps/dashboards/bda7594740fd40299423467b48e9ecf6 [accessed January 13, 2022].
2. SARS-CoV-2 infections and hospitalizations among persons aged ≥16 years, by vaccination status - Los Angeles County, California, May 1-July 25, 2021;Griffin;MMWR Morb Mortal Wkly Rep,2021
3. Reduced risk of reinfection with SARS-CoV-2 After COVID-19 vaccination - Kentucky, May-June 2021;Cavanaugh;MMWR Morb Mortal Wkly Rep,2021
4. Pew Research Center. August, 2020. Nearly half of U.S. Adults say dating has gotten harder for most people in the last 10 years. www.pewresearch.org [accessed October 26, 2021].
5. Multiple health behaviours among mothers and partners in England: clustering, social patterning and intra-couple concordance;Graham;Soc Sci Med,2016