Communicable Disease 2 - Viruses

• Are viruses living organisms?

  no
• Are viruses made of cells? 

  no
• 1. As they can't reproduce themselves, viruses have to enter one of our cells, and then use it to create multiple copies of the virus itself.
• Once there are lots of copies, the viruses cause the cell to burst, and then go on to infect neighbouring cells.
• How can measles be spread between people?

  Via droplets in air when an infected person coughs or sneezes
• What are the symptoms of measles?

  Fever (feeling hot and cold)

  red skin rash
• Infection with the HIV virus can lead to __________. This is where the immune system is so weak that the person can catch unusual infections. 

  AIDS
• What is the treatment for HIV/AIDS? 

  Antiretroviral drugs 
• What type of organism does Tobacco Mosaic Virus (TMV) infect? 

  plants
• What is the main symptom of Tobacco Mosaic Virus (TMV)?

  Patches of the leaves get discoloured 
• Tobacco Mosaic Virus (TMV) reduces the amount of photosynthesis that a plant can do.

  What are the consequences of this?

  The plant won't be able to produce as many sugars 

  The plant won't be able to grow as well