- 
  
  
- 
  
  an acute contagious viral disease, with fever and pustules that usually leave permanent scars. It was effectively eradicated through vaccination by 1979.
- 
  
  (No exact date recorded)
 An infectious and often fatal bacterial disease of the small intestine, typically contracted from infected water supplies and causing severe vomiting and diarrhoea.
- 
  
  By Louis Pasteur and Emile Roux A contagious and fatal viral disease of dogs and other mammals, transmissible through the saliva to humans and causing madness and convulsions.
- 
  
  (no exact date recorded) a bacterial disease marked by rigidity and spasms of the voluntary muscles
- 
  
  (no exact date recorded) the commonest form of plague in humans, characterized by fever, delirium, and the formation of buboes.
- 
  
  (no exact date recorded) an acute and highly contagious bacterial disease causing inflammation of the mucous membranes, formation of a false membrane in the throat which hinders breathing and swallowing, and potentially fatal heart and nerve damage by a bacterial toxin in the blood. It is now rare in developed countries owing to immunization.
- 
  
  (no exact date recorded) an infectious bacterial disease characterized by the growth of nodules (tubercles) in the tissues, especially the lungs.
- 
  
  (no exact date) an infectious bacterial disease affecting especially children, and causing fever and a scarlet rash. It is caused by streptococci.
- 
  
  (no exact date recorded) a contagious bacterial disease chiefly affecting children, characterized by convulsive coughs followed by a whoop.
- 
  
  (no exact date recorded) a tropical virus disease affecting the liver and kidneys, causing fever and jaundice and often fatal. It is transmitted by mosquitoes.
- 
  
  
- 
  
  
- 
  
  By Jonas Salk
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  
-