Protection against mosquitos and concern about DEET One mosquito bite and it seems we are exposed to an increasing host of bad stuff from malaria, West Nile and now the Zika virus. If that is not enough, Fido can end up with heart worms. Is there any protection? Yes. There is an effective repellent that has worked for 50 years on hundreds of millions of people with few, if any, side effects: DEET. Some still don't trust it. Popular Science calls DEET the most effective mosquito repellent ever invented. But, like many chemical agents, DEET has come under suspicion in recent years, even though it has…