Because blackmailing the rest of the world is apparently good business:
According to the German newspaper Die Welt am Sonntag, which first reported the story on Sunday, Mr. Trump offered CureVac roughly $1 billion in exchange for exclusive access to the vaccine. The newspaper quoted an unnamed German government source who said Mr. Trump wanted the resulting vaccine “only for the United States.”
White House officials did not immediately respond to requests for comment. But two senior American officials said that some of the German news accounts first reporting the story were overblown, particularly with regard to any effort by the United States to secure exclusive access to a vaccine.
In this day and age, when verifiable facts are described as "fake news" by the Trump administration, calling something "overblown" is a tacit admission of guilt. Trump simply has no ethical boundaries, and I don't doubt for one minute that he would use that exclusive control of a vaccine as a lever to get other things he wants. To put it bluntly, Germany is pissed off:
Die Welt reported that the German government was making counterbids to the company to persuade it to stay. German lawmakers began to issue statements on Sunday.
“The exclusive sale of a possible vaccine to the USA must be prevented by all means,” Karl Lauterbach, a German lawmaker who is also a professor of epidemiology, said on Twitter. “Capitalism has limits.”
Adding to the dismay in Germany was the fact that CureVac works closely with a taxpayer-funded government research organization, the Paul Ehrlich Institute for vaccines and biomedicines. Peter Altmaier, Germany’s economy minister, praised the company for not being tempted by any American offer. “It was a great decision,” he said in a television talk show on Sunday night. “Germany is not for sale.”
Mr. Altmaier said the government would “make sure that the necessary help is available” to the company in developing the vaccine. And he warned that if any hostile offer was attempted, Germany would step in.
“When it’s about important infrastructure and national and European interest,” he said, “we will also act if we have to.”
Frankly, I'm getting tired of feeling (every day) that I should apologize to the rest of the world for the behavior of our President. It's exhausting.