There could be a train of thought that says if you ingest tiny amounts of somerhing like that, you might build up a resistency.
I say that as in recent years, people have theorised about the increase of certain things like Asthma, even though air quality has had to be legally improved for many years now, so things like Smog, Airborne industrial emissions etc etc, have to be lower and meet certain criteria, and peoples houses are often more sterile than they used to be.
Some people I've heard who were alive well over 50 years ago, talk about kids playing in the street, and dropping something like a Sandwhich and just eating it, saying the slight exposure to bugs and germs built up resistancy, in a way that things like sterile domestic environments probably don't do anymore, because that exposure when young that helps build up any possible resistance is taken away.
I know that pesticides aren't a great thing to consume, but given the theoretical possibility, that gradual ingestion could possibly improve resistancy, against any pesticide issues, or even other microbes / bugs, (Mosquitos and DDT being an example), should people necessarily be overly concerned anyway?
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