President of the Asthma Society of Canada Dr. Robert Oliphant warns we're in the midst of a very dangerous time of year for asthma-sufferers.
About 25-percent of hospital admissions happen in a two week period in September.
He says students are particularly vulnerable when school starts back up after the summer.
Many students take a medication break during the summer...but Oliphant says they should be taking it the entire holiday.
