• All diseases thrive in the right environment."Bacteria" is Copyrighted by Flickr user: kaibara87 (Umberto Salvagnin) under the Creative Commons Attribution license.
  
  

Function

• Diseases are living organisms."mutation" is Copyrighted by Flickr user: woodleywonderworks (woodley wonderworks) under the Creative Commons Attribution license.
  
  A disease is a living organism that can destroy internal and/or external parts or areas of the body. As a disease survives it always destroys its host in one way or another.
  
  

Effects

• Damage caused by disease"Foot Surgery" is Copyrighted by Flickr user: ex_magician (Michael (a.k.a. moik) McCullough) under the Creative Commons Attribution license.
  
  Diseases can cause long and short term problems and/or conditions with the body, such as chemical and cellular imbalances, pain, disabilities, death, organ damage, system damage or bone damage.
  
  

History

• Leprosy is one of the oldest diseases in the world. Currently, there is a decrease in the number of patients diagnosed with leprosy each year, compared to confirmed diagnostic statistics of previous years.
  
  

Identification

• A tick bite can cause Lyme disease."Tick bite" is Copyrighted by Flickr user: NIOSH - Nat Inst for Occupational Safety & Health (National Institute for Occupational Safety and Health (NIOSH)) under the Creative Commons Attribution license.
  
  Types of diseases that are transmitted from animals to humans are known as zoonotic diseases. The most common forms are rabies, flu and Lyme disease. The most common hosts of diseases passed on to humans are fleas, mosquitoes and ticks.
  
  

Fun Fact

• A bee collecting pollen"Pastel bee" is Copyrighted by Flickr user: annia316 (Anita Martinz) under the Creative Commons Attribution license.
  
  The bee was recognized in ancient Greece and ancient Egypt as a cure for several diseases, including arthritis and lupus. Today, bee pollen is used to treat a number of maladies.