How can a tiny mosquito be such an enormous threat to humankind?

How can a tiny mosquito be such an enormous threat to humankind? And how is it that this once distant threat is now lurking in our own backyards? Filmed on four continents and featuring breathtaking macro photography, Mosquito paints an emotionally charged portrait of the people who are now living with mosquito borne diseases and we in North America who fear their arrival.