In 2012 the USA saw the highest number of pertussis (whooping cough) cases since 1955. New research finds that a likely explanation for this rise in disease is a drop in the degree of vaccine protection for each vaccinated individual. The team worked with 60 years of pertussis disease data to determine what best explained the recent increase in the disease.
When I was your age, whooping cough wasn’t what it is today. I’m sure we all know the stereotypical grandfather telling stories like that, but — at least in this case — if he started his story off like that then he is actually right. Over the last few years, this once-common childhood illness, has evolved in response to its own vaccine, in other words this isn’t your parents’ pertussis.