Vaccines teach your immune system to recognize pathogens, but sometimes your body needs a bit of a reminder.

Whooping cough used to infect hundreds of thousands of people in the U.S. and kill thousands of children every year. Join us as we learn about the women who developed the vaccine that has since saved thousands of lives.

Howcast - Learn if baby vaccines are safe from pediatrician Dyan Hes, M.D. in this Howcast video about newborn and baby development.

Nearly 18,000 cases of whooping cough have been reported so far this year in the US, according to the Centers for Disease Control. If the trend continues this would be the worst outbreak since 1959, when 40,000 cases were reported. The...

More than 10 per cent of students at some Toronto alternative schools have been exempt from vaccinations because of their parents wishes, public health data shows.

Dr. Janice Fitzgerald says there is community spread of whooping cough, also known as pertussis, with 50 cases reported so far this year. Normally, Newfoundland and Labrador only sees five. Several schools have confirmed cases and...

There are 50 confirmed cases of whooping cough, or pertussis, so far this year in Newfoundland and Labrador — normally, there are three or four annually. Dr. Natalie Bridger, a pediatric infectious disease specialist, says people should...

An exclusive inside look at a lab where Canadians are getting sick on purpose to test a new vaccine for whooping cough.

An exclusive inside look at a lab where Canadians are getting sick on purpose to help scientists study whooping cough infections — and one day develop a new vaccine.

An exclusive look at a lab where Canadians are getting sick on purpose to help scientists study whooping cough — and one day develop a new vaccine.

Doctors say it's important that pregnant women, at risk adults and babies are up to date on their shots and boosters.

This year, 8,077 cases of whooping cough have been reported in the U.S., according to data from the Centers for Disease Control and Prevention. It's more than double the case rate from last year. (Scripps News)

Health officials in Washington state are alerting residents to a sharp rise in cases of pertussis, also known as whooping cough. (Scripps News)