Viral diseases

• What are viruses considered to be?

  Organisms
• How do viruses reproduce?

  By using another organism's cell machinery
• What happens when a virus reproduces inside a cell?

  The cell bursts, releasing new viruses
• Why do viruses make us feel ill?

  They damage our bodies during reproduction
• How is the measles virus spread?

  By droplets from coughing or sneezing
• What are the symptoms of measles?

  Red rash and fever
• How common is measles in the UK?

  It's rare due to vaccinations
• How is HIV primarily spread?

  Through sexual contact and bodily fluids
• What does HIV stand for?

  Human immunodeficiency virus
• What happens when someone first catches HIV?

  They may experience flu-like symptoms
• What is the progression of HIV to AIDS?

  The immune system weakens, leading to infections
• What are antiretroviral drugs used for?

  To prevent HIV from replicating
• What is the effect of tobacco mosaic virus on plants?

  It causes discoloration and affects photosynthesis
• Which plants are affected by tobacco mosaic virus?


  Tobacco and certain other species
• What does the term "mosaic" refer to in tobacco mosaic virus?

  The patchy discoloration on leaves
• How does tobacco mosaic virus affect plant growth?

  It reduces sugar production for growth