virus

• 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
• Why is measles rare in the UK?

  Most people are vaccinated against it
• How is HIV primarily spread?

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

  Human immunodeficiency virus
• What does HIV do to the immune system?

  It causes a deficient immune system
• What are the initial symptoms of HIV infection?

  Flu-like symptoms such as fever and tiredness
• What happens to the immune system as HIV progresses?

  It becomes weak, leading to unusual infections
• What is AIDS?

  A disease where the immune system can't cope
• How has the treatment for HIV changed over time?

  Antiretroviral drugs prevent virus replication
• What can people with HIV do to live normal lives?

  Access antiretroviral medications early
• What does the tobacco mosaic virus affect?

  Certain plant species like tobacco
• What is the effect of the tobacco mosaic virus on plants?

  It causes discolored patches on leaves
• Why is the tobacco mosaic virus called "mosaic"?

  It creates a mosaic pattern on leaves
• How does the tobacco mosaic virus affect photosynthesis?

  It prevents proper sugar production
• What are the main effects of viral infections on the body?

  • Damage to cells during reproduction
  • Symptoms like fever and rash
  • Weakened immune system leading to infections