Usually the incubation period of rabies is 1–3 months, but may vary from less than 1 week to more than 1 year.

The initial symptoms of rabies are usually non-specific and suggest involvement of the respiratory, gastrointestinal and/or central nervous systems. Symptoms include-

• Fever
• Headache
• Pain and tingling at the site of the bite

Ten days later, the patient may experience-

• Anxiety, agitation or depression
• Hallucinations
• Bizarre behavior
• Drooling
• Convulsions

• Increased excitability, which is the hallmark of the condition
• Hydrophobia (fear of water) is present in half the patients. This is usually due to a difficulty with swallowing.
• Aerophobia (fear of fresh air) is considered a characteristic feature of rabies
• The patient goes on to develop fits and respiratory paralysis.

Death usually occurs within 10-14 days. Without intensive care, death occurs during the first seven days of illness.