To cite covidregionaldata in publications use:

  Joseph Palmer, Katharine Sherratt, Richard Martin-Nielsen, Jonnie
  Bevan, Hamish Gibbs, Sebastian Funk and Sam Abbott (2021).
  covidregionaldata: Subnational data for COVID-19 epidemiology, DOI:
  10.21105/joss.03290

A BibTeX entry for LaTeX users is

  @Article{,
    title = {covidregionaldata: Subnational data for COVID-19 epidemiology},
    author = {Joseph Palmer and Katharine Sherratt and Richard Martin-Nielsen and Jonnie Bevan and Hamish Gibbs and Sebastian Funk and Sam Abbott},
    journal = {Journal of Open Source Software},
    year = {2021},
    volume = {6},
    number = {63},
    pages = {3290},
    doi = {10.21105/joss.03290},
  }