Immune System

The immune system is the body’s natural defense system that helps fight infections. The immune system attacks organisms and substances that invade body systems and cause disease.

Ways HIV Cannot Be Spread

HIV does not survive well outside the body. HIV cannot be spread from one person to another in any of the following ways: Casual contact In studies of hundreds of households in which families have lived with and cared for people who have AIDS, including situations in which no one knew that the person was HIV-infected…

Zika Virus

What is Zika virus? Zika virus is a type of virus that is spread by mosquitoes. The mosquitoes that carry Zika are most active during the day but can bite at night. You’re more likely to get the virus if you travel to parts of the world where it’s more common. This includes parts of South America, Central America…