the Side Effects of Rabies Vaccines in Humans - Internal Medicine

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What are the side effects of rabies vaccine in humans?


Hello, doctor.
I apologize for following up on my previous question.
I went to the hospital to receive the first dose of the rabies vaccine after being bitten by a stray cat on my ankle.
However, my family believes it is unnecessary and opposes the vaccination because we are not in an endemic area (Changhua Township).
They think I am just scaring myself and have advised me not to get the remaining four doses.
I would like to ask you, are there any side effects associated with the rabies vaccine for humans? I came across an article in simplified Chinese online that mentioned: individuals who receive the rabies vaccine may experience gradual genetic decline as they age, with cells losing their regenerative capacity and decreasing in number, leading to memory loss and slower cognitive responses.
It also suggested that vaccinated individuals might affect their offspring and, during the aging process, could emit sounds resembling barking, indicating that death is near.
Patients may also experience difficulty swallowing, fear of wind, water, and cold.
These symptoms are often overlooked as they resemble those of aging diseases.
After reading this article, I find the idea of getting vaccinated quite frightening, and I am unsure of its validity.
Should I continue with the vaccinations? Thank you, doctor, for clarifying this!

xo, 20~29 year old female. Ask Date: 2015/11/26

Dr. Liao Zhongxin reply Internal Medicine


Dear readers:
1.
Regarding the situation of receiving the first dose of rabies vaccine after being bitten by a wild cat on the ankle, while family members believe it is unnecessary and oppose vaccination because it is not an endemic area (Changhua Township), and that I am just scaring myself (family members suggest I skip the remaining four doses):
(1) Administering five doses within one month is the internationally recognized effective prevention protocol for rabies, and vaccination is recommended.

(2) Taiwan experienced an outbreak of rabies among wild animals in 2013, but there have been no local rabies cases reported since then.
2.
As for the statement regarding individuals who have received rabies vaccinations experiencing gradual genetic decline as they age, with cells losing their regenerative capacity, a decrease in cell count, and a decline in memory and response speed, as well as potential reproductive impacts on offspring:
(1) The symptoms described, such as abdominal sounds resembling barking, are indicative of rabies onset following a wild animal bite, not side effects of the rabies vaccine, so please do not confuse the two.

(2) If there are any side effects from the vaccine, they can be reported to medical institutions for evaluation to determine if they are related to the vaccine.
Thank you!

Reply Date: 2015/11/26

More Info


When it comes to rabies vaccination in humans, it is essential to understand both the necessity of the vaccine and the potential side effects associated with it. Rabies is a viral disease that is almost always fatal once symptoms appear, making post-exposure prophylaxis (PEP) critical for anyone who has been bitten by an animal that may carry the virus, such as a wild cat.
The rabies vaccine is generally safe and effective. Common side effects of the rabies vaccine can include soreness at the injection site, mild fever, headache, and fatigue. These side effects are typically mild and resolve on their own within a few days. Serious side effects are rare but can occur, such as allergic reactions or neurological symptoms. However, the risk of severe adverse effects is significantly outweighed by the risk of contracting rabies, which is almost universally fatal once clinical symptoms develop.

Regarding the concerns raised in the article you found online, it is important to approach such claims with skepticism. The assertions that rabies vaccination leads to genetic deterioration, loss of cellular regeneration, or other severe long-term health issues are not supported by scientific evidence. Vaccines, including the rabies vaccine, undergo rigorous testing for safety and efficacy before being approved for public use. The claims about aging and the specific symptoms mentioned (like difficulty swallowing or fear of water) are more aligned with rabies symptoms rather than vaccine side effects.

The rabies vaccine is designed to stimulate the immune system to produce antibodies against the rabies virus. This process does not interfere with the body's genetic material or cellular function in the ways described in the article. Instead, it prepares the immune system to respond effectively if exposed to the rabies virus in the future.

If you have already received the first dose of the rabies vaccine, it is crucial to complete the full vaccination schedule, which typically includes a series of four additional doses administered over a period of time. Completing the vaccination series is vital for ensuring adequate protection against rabies.

In summary, while it is natural to have concerns about vaccines, the rabies vaccine is a critical preventive measure against a deadly disease. The side effects are generally mild and temporary, and the benefits of vaccination far outweigh the risks. If you have any lingering doubts or concerns, it is advisable to discuss them with a healthcare professional who can provide evidence-based information and guidance tailored to your situation. Completing the rabies vaccination series is highly recommended to ensure your safety and health.

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