According to the Mayo Clinic, once you become infected with whooping cough, it takes about seven to 10 days for signs and symptoms to appear, though it can sometimes take longer.
They're usually mild at first and resemble those of a common cold:
After a week or two, signs and symptoms worsen. Thick mucus accumulates inside your airways, causing uncontrollable coughing. Severe and prolonged coughing attacks may:
Infants may not cough at all. Instead, they may struggle to breathe, or they may even temporarily stop breathing.
The Mayo Clinic suggests you call your doctor if prolonged coughing spells cause you or your child to: