That seems to be the core fact in the article, and no source is given. It seems ridiculous to my eyes, you'd think this would be an easy thing to cite...
Edit: Yeah, this seems to be bunk. Here's a relatively authoritative-looking source for "Plasma, Vaccines, Blood" which puts it at $23B per year:
https://www.ustradenumbers.com/export/plasma-vaccines-blood/
US total exports are around $2500B per a quick google, which puts that at about half what is claimed.
And of course mixed in with that blood is the presumptively much larger trade in vaccines, which is a known US export industry. I can't find anything that tracks this number with blood donation products split out.
Second edit: As others in this topic are pointing out, in fact that "plasma/blood/vaccines" number includes animal products also. So this article is garbage, sorry.