Impatient for technological change.

I started this topic a long while ago, but admittedly failed to live up to my hopes. Well here's another one.

You know those pills or goo you put on your dog to protect them from fleas, well apparently they also protect from mosquito bites. As I've been told the dogs actually emit a bit of repellent from their skin.

Why don't they do this for people? If I could take a pill once a month and never get bitten by a mosquito I would take it, heck even if I reacted like some dogs (puked or freaked out for a little while), I'd still take it. I hate getting bit by mosquitoes.