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Infectious Diseases :
 

This is one of the largest and best-known category, infectious diseases are those caused by transmissible infectious agents such as viruses, bacteria, fungi, parasites, and prions. Transmission of an infectious disease may occur through one or more of diverse pathways including physical contact with infected individuals. These infecting agents may also be transmitted through liquids, food, body fluids, contaminated objects, airborne inhalation, or through vector-borne spread.

 
The term infectivity describes the ability of an organism to enter, survive and multiply in the host, while the infectiousness of a disease indicates the comparative ease with which the disease is transmitted to other hosts. An infection however, is not synonymous with an infectious disease, as an infection may not cause important clinical symptoms or impair host function.
 
Three pathogens that causes the most deaths:
 
HIV (the virus that causes AIDS), Tuberculosis, & Malaria.
 
 
Some of the Major types of Infectious diseases :
 
        Cholera
      Dysentery
      Influenza
      Malaria
      Tuberculosis
      Creutzfeldt
      Jakob disease
      Bubonic plague
       Smallpox
       Rift Valley fever
       Chagas disease
       Ebola
       Lassa fever
       Severe acute respiratory syndrome
       Sexually transmitted diseases AIDS
 
 
 
 
     
     
  Diseases
     
  Infections
     
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