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What are Infectious Diseases?

Infectious diseases are disorders caused by organisms, such as bacteria, viruses, fungi, or parasites. They can spread directly or indirectly from person to person or through vectors like insects.

Types of Infectious Diseases

  • Bacterial Infections: Caused by bacteria like streptococcus and staphylococcus.
  • Viral Infections: Resulting from viruses such as influenza, HIV, and COVID-19.
  • Fungal Infections: Caused by fungi, including diseases like athlete's foot and candidiasis.
  • Parasitic Infections: Caused by parasites like malaria and giardiasis.

Transmission

Infectious diseases can be transmitted in various ways, including:

  • Person-to-person contact
  • Food and water contamination
  • Airborne transmission
  • Contact with contaminated surfaces
  • Vector-borne transmission through insects

Impact on Global Health

Infectious diseases represent a significant burden on global health, contributing to morbidity and mortality worldwide. Public health initiatives focus on prevention, vaccination, and treatment to control outbreaks.

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