Yellow Fever: A Deadly Threat

Yellow fever is a viral disease transmitted primarily by mosquitoes, particularly the Aedes aegypti species. Here’s a comprehensive overview:

Overview

  • Causative Agent: The yellow fever virus, a member of the Flavivirus genus.
  • Transmission: Primarily through the bites of infected mosquitoes. It can also spread through exposure to infected body fluids and tissues, although this is less common.

Symptoms

Initial Phase (3 to 6 days after infection)

  1. Fever: Sudden onset of high fever.
  2. Chills: Feeling cold and shivering.
  3. Loss of Appetite: Decreased desire to eat.
  4. Muscle Pain: Generalized aches and pains.
  5. Headache: Severe headaches.
  6. Nausea and Vomiting: Upset stomach and vomiting may occur.

Toxic Phase (occurs in about 15% of cases)

This phase can develop after the initial phase and can be severe: read more

Decoding Hepatitis B: Symptoms, Diagnosis, and Management

Hepatitis B is a viral infection that affects the liver, caused by the hepatitis B virus (HBV). Here’s a breakdown of what you need to know:

Nature of the Virus

  • Type: Hepatitis B is caused by a DNA virus belonging to the Hepadnaviridae family.
  • Structure: The virus has a core of genetic material surrounded by a protein shell (capsid) and an outer envelope that contains viral proteins.

The symptoms of hepatitis B

The symptoms of hepatitis B can vary depending on whether the infection is acute or chronic. Here’s a detailed look at the symptoms for each type: read more

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