http://abcnews.go.com/wire/US/reuters20020718_482.html
<<The number of infants dying from whooping cough, once a major killer of children in the United States, is rising despite record high vaccination levels in the nation, federal health officials said on Thursday.>>
<<In 2000, the latest year that data was available, there were 7,867 reported cases of the disease and 17 fatalities, compared to 7,297 cases and 14 deaths the previous year.
Infant whooping cough deaths rose steadily in the 1980s and 1990s.>> (along with vaccination rates)
<<Researchers with the Centers for Disease Control and Prevention speculated that the worrying trend might be an indication that the bacteria that causes whooping cough was becoming more common in the nation.>>
Hmmm.... what causes (other than vaccinations) may make it "more common in the nation"...
