To cite package ‘projections’ in publications use:

  Jombart T, Nouvellet P (2024). _projections: Project Future Case
  Incidence_. R package version 0.6.0,
  <https://github.com/reconhub/projections>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {projections: Project Future Case Incidence},
    author = {Thibaut Jombart and Pierre Nouvellet},
    year = {2024},
    note = {R package version 0.6.0},
    url = {https://github.com/reconhub/projections},
  }