"In the United States, asthma cases have increased by more than 60 percent since the early 1980s, and asthma-related deaths have doubled to 5,000 a year. What is causing the asthma epidemic and what can we do to stem the tide? A recent series of articles in theJournal of the American Chiropractic Association (JACA)delves into this question and offers advice from doctors of chiropractic and allergists who have helped control asthma symptoms in many patients.

"People in their 30s and older can remember that when they were young, it was very unusual for even one child in school to have asthma. Schoolchildren now often know several kids with asthma in a single class. The rapid increase in the number of young people with asthma was brought home to Dr. Scott Bautch, past president of the American Chiropractic Association's (ACA) Council on Occupational Health, when he went to a football game with his 13-year-old son: "Someone on the field had a breathing problem. It was hard to see whose son it was, and 15 parents ran to the field with inhalers."

"So far, researchers don't know why cases of asthma are increasing at such an alarming rate. They hypothesize that a combination of genetics and some non-hereditary factors — such as increased environmental exposure to potential allergens — play a role."

http://www.acatoday.org/content_css.cfm?CID=63

 Interesting.... since the 1980's. What happened then?

1980   children received 8-9 vaccines

1980 Meningococcal polysaccharide vaccine, groups A, C, Y, W135 combined (Menomune)  

1982  Hepatitis B vaccine becomes available.    

1983 Pneumococcal vaccine, 23 valent  

1985  The FDA gave a license to Praxis Biologicals for the first HIB vaccine for use in 24 month old children and, shortly after, Lederle and Connaught also were given licenses to manufacture HIB vaccine.    

1986 The National Childhood Vaccine Injury Act (NCVIA) no manufacturer "shall be liable in any civil action" for any injury that "resulted from side effects that were unavoidable even though the vaccine was properly prepared and was accompanied by proper directions and warnings."

1986  Licensure of first recombinant vaccine (hepatitis B)    

1989  Two-dose measle vaccinerecommendation 

1989  Licensure of first polysaccharide conjugate vaccine(Haemophilus influenzae type b) for routine vaccination at 15 months

 ...the Centers for Disease Control mandated that vaccines increase. Vaccines increased from 10 to 24  

It looks like vaccines are causing the asthma. But that wasn't what I found. Parents give Tylenol to their children after vaccinations. That is I what I think is playing a major role in the asthma epidemic.