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* Environment:
-physical(radiation,noise,temperature,pressure)
-mechanical(risk factors of work accidents)
-chemical(pneumoconiosis)
-water,air,food as vehicle of transmission

* General epidemiology:
VIP VIP VIP (disinfection is not included)

* Special epidemiology:
-droplet bact.(TB,meningitis,streptococcal VIP then pertusis,diphtheria less imp)
-droplet viral(measles,chickenpox,influenza VIP then complication of rubella,mumps less imp)
-food borne all is VIP
-contact (tetanus ,rabies)
-arthropod (plague,yellow fever)

NB:the important points in each disease are source of infection,mode of transmission,control & prevention.

* Non communicable diseases:
VIP except liver ,kidney diseases

NB:the imp points in each disease: risk factors,levels of prevention