Vaccines Won’t Protect Millions of Patients With Weakened Immune Systems

Many cannot produce enough infection-fighting cells to fend off the coronavirus. But researchers are testing one therapy that may help: monoclonal antibodies.

Dr. Andrew Wollowitz, an emergency physician at Montefiore Hospital and a cancer survivor, didn’t produce antibodies when he received the vaccine, as treatments have wiped out his immune system. Photo: Desiree Rios for The New York Times