When a person is infected with the
rabies virus, the virus multiplies within the body until symptoms develop. This time period between infection and the onset of symptoms is called the incubation period. The
rabies incubation period may vary from a few days to several years, but is typically one to three months.
When the
rabies virus reaches the brain, it multiplies quickly and rabies symptoms begin. Over the next week, the rabies virus causes
encephalitis and ultimately death.
Early rabies symptoms in humans are similar to
flu symptoms.
These early symptoms can include:
- Fever
- Headache
- General tiredness
- Discomfort, numbness, or pain at the site of the bite.
Progressive Rabies Symptoms
As the disease progresses, neurological symptoms appear and may include:
- Insomnia
- Anxiety
- Confusion
- Slight or partial paralysis
- Excitation
- Hallucinations
- Agitation
- Hypersalivation
- Difficulty swallowing
- Hydrophobia (fear of water).