The patient, Kyle resident Brianna Bonnet, says the new treatment for her lymphoma turned her blood cells into “ninjas.”

Her doctor is a bit more scientific in his explanation.

Bonnet, 34 and a kindergarten teacher in Austin, began receiving CAR-T, a new form of immunotherapy, in 2018, and she was the first Texas Oncology patient from the Austin area to do so.

Two years later, she is back in the classroom and her physician, Jason Melear, M.D., medical oncologist and hematologist at Texa...