Pertussis, also known as whooping cough, is a contagious respiratory illness which can infect persons of all ages, but is most serious among infants and young children. The illness begins much like a cold, with a cough progressing to spells of explosive coughing which can interrupt breathing, eating, and sleeping, and can be followed by vomiting and exhaustion. The loud crowing or "whooping" sound as they struggle to inhale air is most common among infants and young children due to the smaller size of their airways. The cough associated with pertussis can last for several weeks to two months or longer. Pertussis can be spread before exhibiting cough symptoms and up to three weeks or more after the cough onset. A vaccine is available to prevent pertussis and is given at ages 2, 4, 6, and 15-18 months of age with boosters at ages 4-6 and 11-12 years of age. Immunization is also recommended for adults under age 65 who expect to have close contact with an infant younger than 12 months of age and healthcare workers who have direct patient contact.

To stay healthy during the holiday season: cover your cough, wash your hands frequently, and get adequate sleep and nutrition.