viral diseases

• Explain measles

  Viral disease which is spread through air (droplets). It causes a red skin rash and fever. People can be vaccinated against it.
• Explain HIV

  Virus spread by sex or bodily fluids. Causes flu like symptoms. It can be controlled by Antiretroviral drugs. It attacks immune cells.
• Explain Tobacco Mosaic Virus

  A virus that causes leaves to be discoloured which means they can't carry out photosynthesis
• What is measles?

  A viral disease that is serious and can cause death if the infected person suffers from complications. It is spread by inhaling droplets from sneezes and coughs.
• What are the symptoms of measles?

  A red skin rash and fever.
• How can we prevent measles spreading?

  Most young children are vaccinated against measles.
• What is HIV?

  A viral disease that attacks the body's immune cells. It is spread by sexual contact or exchange of body fluids such as blood (eg. when drug users share needles).
• What are the first symptoms of HIV?

  A flu-like illness is the first symptom. If successfully controlled, the virus doesn't attack the body's immune cells.
• What is late stage HIV (AIDS)?


  In late stage HIV, the immune system becomes seriously damaged and the infected person gets ill from any other infections eg. colds or flu, and sometimes cancers.
• How can we treat HIV?

  Medicines called antiretroviral drugs can successfully control the virus and prevent some of the damage to the immune system. This can stop HIV becoming AIDS.
• What is Tobacco Mosaic Virus (TMV)?

  This is a virus that infects and damages many plant species including tomato.
• What are the symptoms of TMV?

  A "mosaic" coloured pattern appears on the leaves. The pattern ranges from paler green, to yellow or brown. If affects plant growth as less photosynthesis occurs.
• how are measles spread

  through air (droplets)
• how is measles spread

  air (droplets)
• how is HIV spread

  sexual contact or exchanging of bodily fluids