Neza-Chalco-Itza: One of Mexico City's many barrios, Neza-Chalco-Itza is the largest slum in the world with roughly four million people. Slums in Mexico city began growing in the early 1900s when the railroad brought new industry -- as well as new industrial zones -- to the city.
Bloodborne pathogens are infectious microorganisms in human blood that can cause disease in humans. These pathogens include, but are not limited to, hepatitis B (HBV), hepatitis C (HCV) and human immunodeficiency virus (HIV). Needlesticks and other sharps-related injuries may expose workers to bloodborne pathogens.
Further details. Blood-borne viruses that cause hepatitis include the hepatitis B virus (HBV) and hepatitis C virus (HCV). Other viruses that cause hepatitis (such as hepatitis A and E) are not usually passed on by blood-to-blood contact and hence do not present a significant risk of blood-borne infection.n infected person can transmit (spread) blood-borne viruses from one person to another by various routes and over a prolonged time period. The most prevalent BBVs are: 1  human immunodeficiency virus (HIV)- a virus which causes accuired immunodeficiency virus (AIDS), a disease affecting the body's immune system;