"Pfizer has been accused of “bullying” Latin American governments in COVID-19 vaccine negotiations and has asked some countries to put up sovereign assets, such as embassy buildings and military bases, as a guarantee against the cost of any future legal cases, the Bureau of Investigative Journalism can reveal."
https://science.thewire.in/external-affairs/world/pfizer-demands-governments-gamble-with-state-assets-to-secure-vaccine-deal/
How Pfizer tried to bully Argentina and Brazil in exchange for vaccines
https://www.wionews.com/world/how-pfizer-tried-to-bully-argentina-and-brazil-in-exchange-for-vaccines-366037
‘Held to ransom’: Pfizer demands governments gamble with state assets to secure vaccine deal
https://www.thebureauinvestigates.com/stories/2021-02-23/held-to-ransom-pfizer-demands-governments-gamble-with-state-assets-to-secure-vaccine-deal