There's a lot of international interest in keeping them away.

It's not all in your head.

Some people really arm or attractive to mosquitoes than others.

Research has determined that it has to do with how each of us smells, which is individual to everyone and partly determined by our DNA.

Fraternal twins are much less similar to each other than identical twins are in terms of DNA and odor.

So experts in London conducted a study between fraternal twins and identical twins to see if there was a difference between the two.

When they exposed the twins to mosquitoes, they found that identical twins were bitten in similar amounts.

But fraternal twins were bitten in differing amounts, meaning that mosquitoes really do bite some individuals more than others.

And that's at least partially because of body odor.

Scientists already have a sense of which compounds in human odors attract mosquitoes.

They're hoping to develop a drug that changes human body odors to make them less attractive to mosquitoes.

That could have major public health benefits, especially in areas where mosquitoes transmit diseases like malaria, dengue fever and West Nile virus.