Concerns About Rabies After Monkey Bite: 20 Years Later - Internal Medicine

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Bitten by a monkey over 20 years ago?


Hello, doctor.
When I was about 8 years old (over 20 years ago), I was bitten by a monkey in Southeast Asia.
However, since it has been such a long time, I can't remember if I received pre-exposure or post-exposure rabies vaccinations, or if I received rabies immune globulin or rabies serum.
I also don't recall the vaccination schedule or whether I received too many or too few doses, or if everything was done according to standard protocols.
Since it has been over 20 years and I have had no issues, can I completely stop worrying about rabies and not take any further action? Thank you, doctor.

A Qiang, 30~39 year old female. Ask Date: 2023/06/30

Dr. Lin Wufu reply Internal Medicine


The incubation period for rabies is not that long, so there's no need to worry!

Reply Date: 2023/06/30

More Info


When it comes to concerns about rabies after a monkey bite, especially one that occurred over 20 years ago, it is important to understand the nature of the rabies virus and the vaccination protocols associated with it. Rabies is a viral disease that is almost always fatal once clinical symptoms appear. However, the good news is that rabies is also preventable through timely vaccination.

In your case, since the incident occurred over 20 years ago and you have not experienced any symptoms of rabies since then, it is highly unlikely that you are at risk for the disease now. The incubation period for rabies can vary, but symptoms typically appear within one to three months after exposure. In rare cases, symptoms can take years to develop, but this is extremely uncommon. Given that you have been symptom-free for two decades, it is safe to conclude that you are not infected with rabies.

The rabies vaccination protocol consists of a series of shots that are administered either before or after exposure to the virus. Post-exposure prophylaxis (PEP) is critical if a person is bitten by an animal that is suspected to have rabies. This usually involves a rabies vaccine and, in some cases, rabies immune globulin (RIG) if the exposure is considered high risk. The standard PEP regimen typically includes a series of four to five doses of the rabies vaccine given over a 14-day period, depending on the specific circumstances of the exposure.

Since you cannot recall whether you received the rabies vaccine or RIG at the time of the incident, it is understandable to have concerns. However, the fact that you have remained healthy and symptom-free for such an extended period is a strong indicator that you are not at risk. Rabies is not something that can remain dormant for decades without symptoms; if you had contracted the virus, you would likely have experienced symptoms long ago.

In summary, based on the information provided, you do not need to worry about rabies from the monkey bite that occurred over 20 years ago. It is always a good practice to consult with a healthcare professional if you have any lingering concerns or if you experience any unusual symptoms, but in your case, the absence of symptoms for such a long time is reassuring. If you are still feeling anxious about this situation, consider discussing it with a healthcare provider who can provide further reassurance and guidance.

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