Viral diseases

• Where do viruses live and reproduce?

  Inside host's body cells
• What is the focus of viral disease management?

  Prevention
• What are the symptoms of measles?

  • Fever
  • Red skin rash
  • Can be fatal
• How is the measles virus spread?

  By droplets in the air
• What is advised for measles prevention?

  Vaccination
• Who is most commonly vaccinated against measles?

  Most young children
• How is HIV spread?

  By sexual contact or the exchange of body fluids
• What initial symptoms does HIV cause?

  Flu-like symptoms
• What can be done if HIV is caught early?

  Anti-viral drugs can suppress the virus
• What can late-stage HIV develop into?

  HIV/AIDS
• What happens to the immune system in late-stage HIV/AIDS?

  The immune system becomes badly damaged
• What are the prevention methods for HIV?

  • Screening blood transfusions
  • Never sharing needles
  • Using condoms
• How is tetanus spread?

  By direct contact and wounds
• How can tetanus spread easily?

  It can spread easily to family
• What are the effects of Tobacco Mosaic Virus (TMV) on plants?

  • Distinct 'mosaic pattern' of discolouration on leaves
  • Reduces photosynthesis
  • Plant growth is restricted
  • Smaller yield of earners
• How can farmers prevent TMV in crops?

  By using pest control and growing TMV resistant crops