Glossary
   
   
   
    
    
    
     
      
       
        
        
        
         
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            Point source
           
           - An epidemic in which all cases are infected at the same time, usually from a single source or exposure. (Giesecke, pp. 135-136)
          
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            Continuous source
           
           - An epidemic in which the causal agent (e.g. polluted drinking water, spoiled food) is infecting people who come into contact with it, over an extended period of time. (Giesecke, pp. 135-136)
          
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            Person-to-Person
           
           (a.k.a. Propagated) - An epidemic in which the causal agent is transmitted from person to person, allowing the epidemic to propagate and spread as a function of Ro. (Giesecke, pp. 135-136)