Scientists have successfully tested a vaccine for Hepatitis C in animals. Hepatitis C, a virus spread through contaminated blood that can cause liver failure and cancers, kills an estimated 350,000 people worldwide each year according to the World Health Organization. The vaccine is created by using “virus-like particles” that cannot multiply but do provoke the immune system to help the body develop resistance to the actual virus. This technique is used to create other vaccines, such as the human papillomavirus. The next step will be to conduct human trials.