Turn red or blue
Seem to be struggling to breathe or have noticeable pauses in breathing
Inhale with a whooping sound
Whooping cough is caused by a type of bacteria called Bordetella pertussis. When an infected person coughs or sneezes, tiny germ-laden droplets are sprayed into the air and breathed into the lungs of anyone who happens to be nearby.
The whooping cough vaccine you receive as a child eventually wears off. This leaves most teenagers and adults susceptible to the infection during an outbreak - and there continue to be regular outbreaks.
Infants who are younger than age 12 months who are unvaccinated or haven't received the full set of recommended vaccines have the highest risk for severe complications and death.
Teens and adults often recover from whooping cough with no problems. When complications occur, they tend to be side effects of the strenuous coughing, such as: