How long can antibodies last after rabies vaccination?

Feb 25, 2023 Source: Cainiu Health

Dr. Sun Shaolong

Introduction

The immunity provided by the rabies vaccine generally lasts for about 6 months. This means that if bitten again by a dog within 6 months after vaccination, you usually do not need to receive another dose. However, since everyone's physical condition varies, the time it takes for rabies antibodies to diminish also differs among individuals. It's important to properly care for and supervise pets. If accidentally bitten, seek medical attention immediately to receive preventive treatment.

After receiving the rabies vaccine, the immune protection typically lasts for about 6 months. This means that if bitten by a dog again within 6 months after vaccination, no additional vaccine doses are required.

A full course of rabies vaccination consists of five injections. Three months after vaccination, the level of rabies antibodies in the patient’s body reaches its peak. If bitten by an animal after this point, further vaccination is generally not needed. However, antibody levels gradually decline over time. If another animal bite occurs at this stage, two additional booster doses are required. If bitten or scratched by an animal within six months of the initial vaccination, one additional dose is sufficient to restore immunity for another 6-month period.

After an animal bite, prompt medical treatment is essential. The rabies vaccine should be administered within 24 hours to stimulate the body's production of protective antibodies. However, in cases of severe wounds—especially large abrasions or bites near the head—it is advisable to seek medical care for additional measures such as booster shots or rabies immunoglobulin. Individual physical conditions vary, so the duration of antibody persistence after vaccination may differ from person to person.

In daily life, it's important to properly care for and supervise pets. If accidentally bitten, one should immediately go to the hospital to receive preventive vaccination.

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