They're filthy rotten LIARS! Ear infections aren't caused by "irritation." They're caused by infections with specific viruses which up-regulate cell-surface antigens that serve as bacterial receptor sites. And all their phony "studies" are cynically designed to exploit the fact that smokers and passive smokers are more likely to be exposed to those viruses, for SOCIOECONOMIC reasons.

smokershistory.com/hearing.html

And Harvard University is a nest of charlatans who deliberately commit scientific fraud and use their political connections to get away with it. They want to shove their religious BS down our throats by pretending it's "science."