Hepatitis B: Symptoms, Prevention and Liver Cancer Risk

The Hepatitis B Virus (Hepatitis B Virus – HBV) is a virus that causes liver infection and can lead to serious complications over time. HBV infection can progress to chronic liver disease, cirrhosis, and especially liver cancer – one of the most common cancers worldwide. Hepatitis B is considered a 'silent threat' because many infected individuals do not show symptoms in the early stages, leading to unawareness of the virus and unintentional transmission to others. Therefore, understanding Hepatitis B is important in reducing the risk of liver cancer and protecting long-term health.

How Hepatitis B is transmitted

Hepatitis B is transmitted through contact with the blood or bodily fluids of an infected person. Common transmission routes include:

• Transmission from mother to child during childbirth
• Unprotected sexual contact with an infected person
• Sharing needles, commonly seen among intravenous drug users
• Direct contact with blood or bodily fluids, such as infected blood transfusions or use of non-sterile medical equipment
• Sharing personal items like razors or toothbrushes (less common)

Symptoms of Hepatitis B

Many people infected with Hepatitis B do not have clear symptoms in the early stages. The disease is divided into two main stages: acute and chronic.

Acute stage

Symptoms usually appear 1–4 months after infection. Patients may experience fever, nausea, vomiting, fatigue, loss of appetite, joint pain, rash, jaundice, yellowing of the eyes, and pain in the upper right abdomen. Most symptoms will improve within 1 month. HBV infection that persists for 6 months or longer is classified as chronic hepatitis B.

Chronic stage

• Asymptomatic carriers: have the virus but normal liver function, can still transmit the virus to others
• Chronic hepatitis patients: continuous liver damage, which can lead to cirrhosis and liver cancer

Hepatitis B testing is especially important, especially when planning to have children, to prevent transmission and treat promptly.

Mechanism of progression to liver cancer

• Acute infection: most have no symptoms, about 30% show flu-like symptoms
• Chronic infection: 5–10% of adults and up to 90% of newborns infected from mothers become chronic carriers
• Chronic hepatitis: causes tissue damage and liver fibrosis
• Cirrhosis: liver loses normal function
• Liver cancer: chronic inflammation and cirrhosis lead to liver cell mutations

Groups that should test for Hepatitis B

• Those with a family history of the disease
• Those with risk behaviors (unsafe sexual practices, sharing needles)
• Healthcare workers exposed to blood and bodily fluids

Regular testing helps detect the disease early and reduces the risk of transmission.

The relationship between Hepatitis B and liver cancer

Chronic HBV infection is the main risk factor for liver cancer. The prolonged inflammation and liver cell damage promote mutations and the development of cancer cells. Cirrhosis caused by HBV also increases the risk of cancer.

Diagnosis of Hepatitis B

Diagnosis begins with a medical history review and clinical examination. Blood tests are the primary method to determine the presence of the virus, assess liver function, and determine the disease stage. In some cases, additional tests such as viral load measurement or liver biopsy may be needed to assess the extent of damage.

Prevention of Hepatitis B

• Vaccination: the most effective method to prevent the disease
• Avoid contact with blood and bodily fluids
• Practice safe sex, use condoms
• Pregnant women infected with HBV should be monitored and treated appropriately to prevent transmission to the child
• Raise community awareness

Hepatitis B Vaccine: Effectiveness and Importance

The Hepatitis B vaccine is highly effective and provides long-term immunity. Newborns in many countries are vaccinated as part of the expanded immunization program. Adults in high-risk groups should also be vaccinated.

Treatment of Hepatitis B

Treatment is based on the doctor's assessment, primarily using antiviral drugs to suppress the virus and protect the liver. Patients need to follow treatment, have regular check-ups, and monitor complications such as cirrhosis or liver cancer.

Frequently asked questions about Hepatitis B

How to prevent Hepatitis B?

Vaccination, safe sex practices, and not sharing needles

How is Hepatitis B treated?

Antiviral drugs or symptomatic treatment

Is chronic Hepatitis B dangerous?

Yes, it has a high risk of leading to cirrhosis and liver cancer

What should pregnant women infected with HBV do?

They should be monitored by a doctor and the child should receive the vaccine immediately after birth

Can Hepatitis B be transmitted through food or drink?

No, it is not transmitted through food or beverages

Caring for yourself if you have Hepatitis B

• Eat a healthy diet with plenty of vegetables
• Limit fatty and processed foods
• Avoid alcohol
• Exercise regularly
• Sleep enough
• Do not smoke
• Be cautious with medication use
• Have regular health check-ups
• Do not share personal items
• Educate family members about prevention

Understanding Hepatitis B correctly

Many people still mistakenly believe that the disease always has clear symptoms or is unpreventable. In reality, many people do not have symptoms, and the vaccine can effectively prevent the disease. Providing accurate information helps reduce stigma and increase access to treatment.

Hepatitis B is a silent threat but can lead to serious complications such as cirrhosis and liver cancer. Prevention through vaccination, practicing safety, and regular health monitoring are key. For those already infected, proper treatment and care can help control the disease and improve quality of life.

References

• World Health Organization (WHO). Hepatitis B. Accessed from: https://www.who.int/news-room/fact-sheets/detail/hepatitis-b
• Centers for Disease Control and Prevention (CDC). Information on Hepatitis B. Accessed from: https://www.cdc.gov/hepatitis/hbv