Author: Noah Weiland, Sharon LaFraniere and Remy Tumin

Johnson & Johnson will allocate 86 percent fewer doses across the United States next week than are now being allocated, according to C.D.C. data, dealing a setback to a national vaccination campaign that has just found its footing.

Johnson & Johnson will allocate 86 percent fewer doses across the United States next week than are currently being allocated, according to C.D.C. data, dealing a setback to a national vaccination campaign that has just found its footing.