David C. Fajgenbaum (born March 29, 1985) is an American immunologist and author who is currently an assistant professor at the Perelman School of Medicine of the University of Pennsylvania.

[2] David C. Fajgenbaum was born on March 29, 1985, in Raleigh, North Carolina, to a physician father and stay at home mother.

Fajgenbaum started Actively Moving Forward in memory of his mother to support other grieving college students at Georgetown.

[11] In 2022, Fajgenbaum co-founded the nonprofit organization, Every Cure, whose mission is to unlock the full potential of approved medicines to treat every disease possible.

[14] In September 2019, Fajgenbaum's second book, Chasing My Cure: A Doctor's Race to Turn Hope Into Action, was published.

According to the Penguin Random House website, Chasing My Cure is a Los Angeles Times and Publisher's Weekly Bestseller.