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True or False: Interferon reactions are part of the third line of defense. 

True or False: Pyrogens trigger fevers. 

Hyaluronidase is an example of an _____________ that allows some bacterial pathogens to digest connective tissue. 

Which of the following is not true regarding asymptomatic infections?

The characteristics of the inflammatory response include __________. 

Which of the following are part of the lymphatic system?

_________ is defined as the number of new cases of a disease contracted within a specific time period in a population. 

Matching: Match each type of vaccine with its description. 

Based on the graph below, which of these bacteria would be the least virulent?     

Histoplasmosis is habitually present in Indiana and a certain number of cases is expected each year. This is an example of a(n) ________ disease.