Killer mosquitos
	Last summer New York was struck with the killer West Nile Virus. It is carried by mosquitoes - but there is no vaccine, and so the whole city was sprayed. Seven people died, and this summer, the virus is back, with a vengeance. It's been detected as far north as Boston, as far south as Maryland. Jane Hughes reports from New York, once again quaking at the prospect of the killer mosquitoes.