There are many multi billion dollar companies that do pharmaceutical research outside the US, their revenue is not exclusively from the US, suggesting there would be no healthcare without the US, is like suggesting there would be no cars without the US
[Roche](https://en.wikipedia.org/wiki/Hoffmann-La_Roche) [Merck](https://en.wikipedia.org/wiki/Merck_Group) [Bayer](https://en.wikipedia.org/wiki/Bayer) [Sanofi](https://en.wikipedia.org/wiki/Sanofi)