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How can viral hepatitis be prevented?

Prevention of hepatitis A and E: Be careful to avoid oral infection!

Maintain good personal cleanliness and careful eating habits. Wash your hands with soap before eating, after using the toilet, and before preparing food.
Wash food and utensils adequately.

Dont drink unboiled water; don’t eat uncooked food. Don’t eat or drink anything from a roadside stand. Don’t go to any restaurant that uses improperly cleaned utensils. To avoid contamination, water supply pipes or water storage tanks must not be located near sewage lines.

Any persons who do not have antibodies to hepatitis A must pay particular attention to the cleanliness of their food and drink when visiting countries and regions where environmental sanitation is poor. The best protection is to get vaccinated or receive an immunoglobulin shot before the trip.

To prevent infection by hepatitis B, C, or D, increase vigilance and take the following preventive measures:
Avoid unnecessary injections and blood transfusions.

Do not use someone elses toothbrush or razor. Do not receive tattoos or eyebrow micropigmentation or have your ears pierced with an unsterilized instrument. Do not engage in abnormal sexual behavior.
Get a vaccination if blood tests confirm that you have not yet contracted hepatitis B. If tests indicate that you carry the hepatitis B virus, do not risk passing the disease to others by donating blood.

Have a blood test if you are pregnant. If you are a hepatitis B carrier testing positive for the e antigen, make sure that your newborn child receives a hepatitis B immunoglobulin shot within 24 hours of birth, and three hepatitis B vaccinations at the proper times afterwards. Other newborns should receive hepatitis B vaccinations 2~5 days after birth, at one month, and at six months.