Hepatitis B: Causes, Symptoms, Treatment, and Prevention

What is Hepatitis B?

Hepatitis B is a viral infection that affects the liver and can cause both acute and chronic disease. It is caused by the Hepatitis B virus (HBV) and is a major global health problem. According to the World Health Organization (WHO), more than 296 million people were living with chronic Hepatitis B in 2019.

How is Hepatitis B Transmitted?

Hepatitis B is primarily spread through contact with infected blood, semen, or other body fluids. Common modes of transmission include:

Unprotected sex with an infected person

Sharing needles or syringes

Mother-to-child transmission during childbirth

Blood transfusions with contaminated blood (rare in countries with strict blood screening)

Sharing personal items like razors or toothbrushes.

Symptoms of Hepatitis B

Many people, especially children, may not show symptoms. However, when symptoms do occur, they can include:

Fatigue

Fever

Loss of appetite

Nausea and vomiting

Abdominal pain

Dark urine

Jaundice (yellowing of the skin and eyes)

These symptoms typically appear 1 to 4 months after exposure to the virus.

Acute vs. Chronic Hepatitis B

Acute Hepatitis B: A short-term illness that occurs within the first 6 months after exposure. Most adults recover fully.

Chronic Hepatitis B: If the virus remains in the body for more than 6 months, it becomes chronic, which can lead to serious health issues like cirrhosis, liver failure, or liver cancer.

Diagnosis

Hepatitis B is diagnosed through blood tests that detect:

HBsAg (Hepatitis B surface antigen)

Anti-HBs (antibodies against Hepatitis B surface antigen)

HBV DNA levels (to measure viral load)

These tests help determine whether the infection is acute or chronic and guide treatment options.

Treatment Options

For Acute Hepatitis B:

Most cases resolve on their own without treatment.

Supportive care includes rest, fluids, and good nutrition.

For Chronic Hepatitis B:

Antiviral medications such as tenofovir and entecavir

Regular liver monitoring and blood tests

In severe cases, a liver transplant may be required

Early diagnosis and treatment can significantly reduce the risk of liver damage.

How to Prevent Hepatitis B

1. Get Vaccinated

The Hepatitis B vaccine is the most effective way to prevent infection. It is safe, highly effective, and usually given in a series of 3 doses.

2. Practice Safe Sex

Use condoms to reduce the risk of transmission during sexual activity.

3. Avoid Sharing Needles

Especially important for people who inject drugs or are exposed to needles in medical settings.

4. Screen Blood Donations

Ensure blood and organ donors are properly screened for HBV.

5. Mother-to-Child Prevention

Pregnant women should be tested for Hepatitis B. If positive, newborns should receive immunoglobulin and vaccine within 12 hours of birth.