Hepatitis C is a viral infection primarily transmitted through blood. Screening for the disease is crucial to ensuring that infected individuals receive the treatments that can now lead to a cure.

HIV, or Human Immunodeficiency Virus, is a sexually transmitted human retrovirus. It weakens the immune system, and if left untreated, leads to AIDS.

Contagious diseases most often affect children at a very young age. Because children are particularly vulnerable, they are a priority target for vaccination programs.