"The concept of vaccine nationalism refers to the signed agreements a number of countries made with the vaccine manufacturers before the shots became available to the general public, allowing them to buy up large amounts, which in turn makes the initial supply of vaccines unaffordable and inaccessible to poorer countries."

https://www.yahoo.com/news/countries-decry-vaccine-nationalism-as-poorer-nations-struggle-for-access-to-shots-213220083.html