January 31, 2023 6:00 AM ET LESLIE WALKER DAN GORENSTEIN Humira, the injectable biologic treatment for rheumatoid arthritis, now faces its first competition from one of several copycat “biosimilar” drugs expected to come to market this year. Some patients spend $70,000 a year on Humira.JB Reed/Bloomberg via Getty Images After 20 years and $200 billion...
