Kieran Healy. 2020. covdata: COVID-19 Case and Mortality Time Series. R package version 0.5.2, .

@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},
}