Question: Electromagnetic Exposure wise, does Amateur radio (Particularly 1.8 to 440 megahertz) induce a health risk due to RF radiation? 

Other than the Maximum Permissible Exposure (MPE) limits, which will cause RF burns etc., are there any studies that show long term usage of radio being bad for you?

Answer: 
Sure, there are [plenty](http://www.dirtyelectricity.org/health-issues.shtml). Unfortunately, they all seem to be [selling](http://lessemf.com/) [something](http://rads.stackoverflow.com/amzn/click/145023822X). 

[The](http://en.wikipedia.org/wiki/Electromagnetic_radiation_and_health#Radio_frequency_fields) [scientific](https://yourlogicalfallacyis.com/burden-of-proof) [consensus](http://www.cancer.org/cancer/cancercauses/radiationexposureandcancer/radiofrequency-radiation) [is](http://hps.org/hpspublications/articles/powerlines.html) [quite](http://www.epa.gov/radtown/power-lines.html) [clear:](http://www.niehs.nih.gov/health/topics/agents/emf/) [no](http://www.who.int/mediacentre/factsheets/fs193/en/) [known](http://en.wikipedia.org/wiki/Mobile_phone_radiation_and_health) [risk](http://transition.fcc.gov/oet/rfsafety/rf-faqs.html#Q5), beyond the obvious risk of being cooked which MPE limits are set to avoid.
There are some indications that RF has ill effects on humans, at least in certain configurations or environments. Here are a few references taken from the top search results from Google Scholar. It looks like there's a lot of debate on this issue, and support for both sides.

[aje.oxfordjournals.org/content/128/5/1175.short](http://aje.oxfordjournals.org/content/128/5/1175.short)

[onlinelibrary.wiley.com/doi/10.1002/bem.10162/full](http://onlinelibrary.wiley.com/doi/10.1002/bem.10162/full)

<http://link.springer.com/article/10.1007/BF00051295>

[aje.oxfordjournals.org/content/127/1/50.short](http://aje.oxfordjournals.org/content/127/1/50.short)

My personal *opinion* is that cell phones are safe, though I don't put mine in my hip pocket or otherwise in close proximity to the soft, permeable tissue of my testicles, nor do I sleep with a phone near my head. I also hold the *opinion* that amplifiers and things like that should be a meter or so away from the body, even the legs, where though there are no major organs, blood constituents are produced in the bone. I also recommend using external antennas for even handhelds, if they're used more than once in awhile. There was an old article on this topic written by a ham / medical doctor, I think in the ARRL magazine, but I don't remember the name of it.

Remember that RF decreases at the inverse square of the distance of propagation. Pushing the source a little away from you makes a big difference in the amount of energy that permeates your tissue.