The United States has a "for profit" healthcare system and is regulated by the Federal Government. The manufacturer's receive government funds and private and public investment. They perform research and development and create novel molecules and technology. Scientific discovery is also performed in US research universities. These universities have agreements with faculty to promote, develop, manufacture and sell for a profit the products and services they discover. This is our system of capitalism. Maybe this system is prohibited in Guyana, but the fact that you don't like it is immaterial when it comes to Covid-19 vaccines on this website.
Furthermore, the US provided 2.8 million dollars of aid to Guyana in 2023 alone. The US has donated many thousands of doses of Paxlovid to Guyana and hundreds of thousands of doses of Covid-19 vaccines to Guyana. Your post was critical, and missing a big thank you to US taxpayers and businesses.
And, even if the US gave Guyana the intellectual property to the Covid-19 vaccine, it would do your country no good because it lacks the technology expertise to produce a product.