To cite the package `covdata` in publications use:

Kieran Healy. 2020. covdata: COVID-19 Case and Mortality Time Series. R package version 0.5.2, <http://kjhealy.github.io/covdata>.

Corresponding BibTeX entry:

  @Manual{,
    title = {covdata: COVID-19 Case and Mortality Time Series},
    author = {Kieran Healy},
    year = {2020},
    note = {R package version 0.5.2},
    url = {http://kjhealy.github.io/covdata},
  }