The main messages and also required knowledge from this lesson are: 

1. basic epidemiological characteristics of blood-borne infections generally - type of pathogens, sources, routes of transmission, susceptible persons,
2. main epidemiological characteristic of HIV/AIDS (pathogen and its infectivity, sources, routes of transmission, susceptible persons, risk population, risk for healthcare workers, occurrence, prevention),
3. main epidemiological characteristic of hepatitis A, B, C, D, E (pathogens and its infectivity, sources, routes of transmission, susceptible persons, risk population, risk for healthcare workers, occurrence, prevention) 
4. basic epidemiological characteristics of food-borne infections generally - type of pathogens, sources, routes of transmission, susceptible persons,
5. main epidemiological characteristic of rotavirosis, norovirosis, salmonelosis, campylobacteriosis (pathogen and its infectivity, sources, routes of transmission, susceptible persons, risk population, risk for healthcare workers, occurrence, prevention),