symptoms and signs of whooping cough
Early Whooping Cough Symptoms After becoming infected with whooping cough, it takes about seven to 10 days for signs and symptoms to appear, and sometimes longer. Early symptoms can last for one to two weeks and usually include the following: 1  Runny nose. 2  Low-grade fever. 3  Mild, occasional cough. 4  A pause in breathing called apnea.