Full disclosure, I'm european.
I know most of you will see that as a good strategy from Trump:
https://www.nytimes.com/2020/03/15/world/europe/cornonavirus-vaccine-us-germany.html
Please consider carefully this: this sort of move will only serve the purpose of pissing off europeans. We "socialists" countries do not hesitate to nationalize our companies if national security is at stake so it won't work. Now pissing us (or chinese for than matter) off with this kind of attempt will only undermine the needed concerted effort and sharing of vital information for fighting this virus.