viral disease

• describe viruses

  reproduce rapidly, live and reproduce inside cells - causing cell damage
• give examples of viral disease

  measles, hiv and tobacco mosaic virus
• describe cause of measles

  viruses transferred through air from droplets of infected persons sneeze or cough
• give symptoms of measles

  red rash, fever and complications
• give preventions methods of measles

  vaccination
• describe hiv

  viruses transferred by sexual contact or bodily fluid exchange
• give symptoms of hiv

  flu like and aid development
• describe aid development

  immune system too badly damaged to protect from other infection or cancer
• give prevention methods of hiv

  contraception, not sharing needle and antiretroviral drugs during hiv stage
• describe cause tobacco mosaic virus

  virus transferred between plant species
• give symptoms of tobacco mosaic virus

  leave discoloration
• describe affect of tobacco mosaic virus

  1. discoloured leaves
  2. less photosynthesis
  3. stunted growth