(WHAS11)- An investigation into the spread of hepatitis c is now in seven different states.
David Kwiatkowski is accused of putting patients at risk in a New Hampshire hospital when he worked as a medical technician.
He is accused of injecting himself with pain medication and then returning the contaminated syringes that later infected patients with hepatitis c, a liver disease.
The case now spreads to seven different states.
A class action suit has now been filed.
Hepatitis c infections spur a wide range of responses.
In some people, it only causes a mild illness lasting a few weeks.
In others, hepatitis c can cause life-threatening complications such as cirrhosis or liver cancer.