One of the benefits of immunization is that a large enough population of vaccinated individuals can often provide protection even for those not vaccinated in the community.

At the beginning of the AIDS epidemic, HIV was universally a man's disease - spread among men in the gay community. Today, women constitute half of the world's infections. Why?

Human papillomavirus (HPV) is probably most notorious for causing cervical cancer. The list of cancers associated with HPV has grown recently, and a new study may add two more cancer types to the list.

HIV positive patients take a daily 'cocktail' of antiretroviral drugs that help keep the virus at bay. If they don't take every pill strictly as prescribed, the effectiveness is reduced.

If you could walk into your local pharmacy and get tested for HIV as easily as you get your annual flu shot, would you be more likely to learn your status?

Sexually active women may wonder which form of birth control is the best way to prevent sexually transmitted diseases. Condom use is the most effective way to prevent HIV infection, says the nation’s top health agency.

Managing a disorder can be an emotionally fraught business for those afflicted. It is all-too-easy for the negative thoughts, worry, fear and stress to compromise dealing with the disease.

Getting the most out of a medication requires taking it every day and on time, especially for chronic conditions such as HIV. It's a tall order for anyone and mental health issues can complicate matters.

Children born to mothers with HIV can live fulfilling lives even if they become infected with HIV. But it's important to know what conditions the children are at a greater risk of developing.