A pandemic influenza would mean widespread infection essentially throughout every region of the world.

Today we know the best way to prevent the spread of Ebola infection is through public health measures.

Activism has been very productive in our society.

A pandemic influenza would mean widespread infection essentially throughout every region of the world.

You help someone's health, and you prevent them from infecting others.

An AIDS-free generation would mean that virtually no child is born with HIV; that, as those children grow up, their risk of becoming infected is far lower than it is today; and that those who become infected can access treatment to help prevent them from developing AIDS and from passing the virus on to others.

The immune systems goal is to protect the body against invaders either from without, such as microbes, or from within, such as cancers and different types of neoplastic transformation.