AIDS
AIDS is the name used to describe a combination of potentially life-threatening infections and cancers, which can develop when someone’s immune system has been damaged by HIV.
You cannot catch AIDS and there is no AIDS test. HIV causes AIDS and it is HIV that can be passed on.
MALARIA
The life cycle of the malaria parasite is split between humans and female mosquitoes. It all begins with a bite from a malaria-infected mosquito.
These videos by the Wellcome Trust further show how it all happens.
TUBERCULOSIS
Tuberculosis (TB) is caused by a bacterium called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but TB bacteria can attack any part of the body such as the kidney, spine, and brain.
If not treated properly, TB disease can be fatal.