CSL Plasma, a blood plasma collection center, in the Olney neighborhood of Philadelphia.
CreditCreditMichelle Gustafson for The New York Times

PHILADELPHIA — Jacqueline Watson needed money. Her son had called her that morning from prison, where he is serving a life sentence, to ask her to make a deposit in his phone account. She didn’t have cash, but she did have something she could sell quickly and legally — her blood.

So, on a crisp Monday morning in November, she traveled 40 minutes by bus to CSL Plasma, a blood plasma collection center wedged between a Dollar Tree and a Wells Fargo bank in a strip mall in North Philadelphia.

“What always brings me here is money,” Ms. Watson, 46, said, as she waited in line to get her vitals taken. “I’m doing it for him, I guess you could say.” She earns about $30 each time she donates.

The plasma business is booming in the United States, with the number of collection centers like this one more than […]

Read the Full Article