The New Hampshire Department of Health & Human Services is looking into the source of what has caused a recent E. coli outbreak.

The strain involved, Escherichia coli O157:H7, is associated with ground beef. At least twelve people in the state have fallen ill since June. Officials do not believe there is a risk to residents so long as they "follow food service best practices." Most important among these is making sure that beef is cooked to at least 160°F.

For more information, visit the DHHS and CDC sites.