VIRUSES

• What are viruses classified as despite not being living organisms?

  Organisms
• How much smaller are viruses compared to animal cells?

  10,000 times smaller
• Why can't viruses reproduce by themselves?

  They need to copy themselves in another cell
• What happens to the host cell when a virus replicates?

  The cell bursts, damaging our bodies
• How do viruses affect our health?

  They make us feel ill
• What are some examples of viruses mentioned in the study material?

  • Measles
  • HIV (human immunodeficiency virus)
• How is measles spread?

  Through droplets when an infected person coughs or sneezes
• What is a common symptom of measles?

  A red rash across the body
• Can measles be fatal?

  Yes, but it can be vaccinated against
• What does HIV stand for?

  Human immunodeficiency virus
• How is HIV spread?

  By sexual contact or exchanging bodily fluids
• What does HIV cause in the body?

  An inadequate immune system
• What are the initial symptoms of HIV?

  Flu-like symptoms such as fever, tiredness, and aches
• What happens after the initial symptoms of HIV?

  People may feel better while the virus damages the immune system
• What is AIDS?

  A condition where the immune system becomes so weak that usual infections develop
• What used to be the final stage of HIV infection?

  AIDS
• What has been developed to help with HIV treatment?

  Antiretroviral drugs that prevent the virus from replicating
• At what stage do antiretroviral drugs work?

  In the early stages of HIV infection