Infectious diseases

Infectious diseases are a group of diseases caused by viruses and pathogens (bacteria, fungi, protists) that have entered the human body. This group includes parasitic diseases caused by parasitic arthropods and helminths.

The classification of infectious diseases is based on the mechanism of pathogen transmission and localization in the human body.

Classification of infectious diseases

Classification of infectious diseases based on their causative agents. The common infectious diseases include TB, pneumonia, HIV/AIDS, malaria, influenza, hepatitis, candidiasis and lymphatic filiariasis

One of the features of infectious diseases is the presence of time from the moment of infection to the appearance of the first signs – the incubation period. The duration of this period depends on the method of infection and the type of pathogen and can range from several hours to several years (rarely).

Up to 80 percent of infectious diseases are spread through dirty hands.

Most vulnerable groups

Certain groups of people are very susceptible to infectious diseases. For them, infectious diseases can cause many complications or even be life-threatening.

The most vulnerable groups include:

  • Children
  • Aged people
  • The patients
  • Persons with chronic diseases
  • Individuals with weakened immune systems
  • Pregnant women