infection and responses

tobacco mosaic virus

measels

HIV

Rose black Spot

Malaria

Salmonella

Gonorrhoea

red skin rash and signs of fever (high temperature)

measles can sometimes lead to pneumonia (a lung infection) or a brain infection called encephalitis

Vaccination against measles when young

droplets of an infected person's sneeze or cough

Sexual contact or by exchanging bodily fluids

flu-like symptoms for weeks then the person doesn't experience any symptoms for several years. during this time it can be controlled with antiretroviral drugs

attacks the immune cells so body's immune system is badly damaged, it can't cope with other infections. At this stage the virus is known as late stage HIV infection or AIDS

it causes a mosaic pattern on the leaves of the plant, parts of the leaves become discoloured

discolouration means plants can't carry out photosynthesis so the virusaffects growth