https://www.fiercepharma.com/special-report/top-5-vaccine-companies-by-2017-revenue
https://www.google.com/search?q=income+of+pharmaceutical+firms&rlz=1C1CHBD_enCZ859CZ859&oq=income+of+pharmaceutical+firms&aqs=chrome..69i57.14996j0j4&sourceid=chrome&ie=UTF-8

https://www.healthaffairs.org/doi/full/10.1377/hlthaff.24.3.622

https://www.biometricupdate.com/201909/id2020-and-partners-launch-program-to-provide-digital-id-with-vaccines

https://www.biometricupdate.com/202007/examining-the-legal-landscape-for-companies-using-biometrics-in-the-united-states