PLoS One
http://www.plosone.org/
[Accessed 10 Apr 2021]

Investigating the procurement system for understanding seasonal influenza vaccine brand availability in Europe
Anke L. Stuurman, Caterina Rizzo, Mendel Haag
Research Article | published 08 Apr 2021 PLOS ONE
https://doi.org/10.1371/journal.pone.0248943