We have invested a lot of time and effort in creating COVID-19 Data
Hub, please cite the following when using it:

  Guidotti, E., Ardia, D., (2020), "COVID-19 Data Hub", Journal of Open
  Source Software 5(51):2376, doi: 10.21105/joss.02376

A BibTeX entry for LaTeX users is

  @Article{,
    title = {COVID-19 Data Hub},
    year = {2020},
    doi = {10.21105/joss.02376},
    author = {Emanuele Guidotti and David Ardia},
    journal = {Journal of Open Source Software},
    volume = {5},
    number = {51},
    pages = {2376},
  }

The implementation details and the latest version of the data are
described in:

  Guidotti, E., (2022), "A worldwide epidemiological database for
  COVID-19 at fine-grained spatial resolution", Sci Data 9(1):112, doi:
  10.1038/s41597-022-01245-1

A BibTeX entry for LaTeX users is

  @Article{,
    title = {A worldwide epidemiological database for COVID-19 at fine-grained spatial resolution},
    year = {2022},
    doi = {10.1038/s41597-022-01245-1},
    author = {Emanuele Guidotti},
    journal = {Scientific Data},
    volume = {9},
    number = {1},
    pages = {112},
  }