EEE, West Nile, malaria: Know the difference between these mosquito-borne diseases

The world's deadliest animal can be squashed flat with a quick slap: It's the mosquito.

The buzzing insects are more than annoying — they spread disease. When they bite and drink blood from a person or animal they can pick up viruses or germs too. If they can go on to bite someone or something else, they deposit the germ right under the skin.

People in some areas of Massachusetts have been warned to stay indoors when mosquitoes are most active after a rare case of eastern equine encephalitis was discovered. And Dr. Anthony Fauci, the former top U.S. infectious disease expert, was recently hospitalized after he came down with West Nile virus.

Both are nasty diseases spread by mosquitoes — though thankfully they are relatively rare.