Blood for money: my journey in the industry buying poor Americans’ plasma

The US is one of the few countries that allows donors - who are often struggling economically - to be paid for plasma

I was sitting in the bright sun watching a college football game next to my dad last fall, talking with him about the book I'd just finished writing and he'd just finished reading, several months before it would be released to the public.

Are there really that many people who sell plasma?" he asked.