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Rabies is a lethal zoonotic infection that, once clinical symptoms emerge, offers no cure. The virus targets the nervous system, and no treatment can reverse the damage once it has progressed.
Transmission is not limited to dogs; squirrels, raccoons, foxes, bats, and other wildlife can carry the virus. The incubation period ranges from three weeks to several months, depending on the bite site, making it difficult to determine whether a person is infected until symptoms manifest.
Early signs mimic a flu‑like illness—weakness, muscle aches, headache, and a mild burning or itching sensation at the bite site. Within about two weeks, the disease advances to a stage marked by anxiety, confusion, agitation, and hallucinations.
The hallmark of advanced rabies is hydrophobia: an intense fear of water that paradoxically coexists with a desperate thirst. Patients often produce copious saliva, become aggressive, and may appear zombie‑like, thrashing and biting anyone nearby. Death typically follows within one to two weeks after the first advanced symptoms appear.
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While rabies circulates in a variety of mammals, the majority of human cases stem from bites by stray dogs. Approximately 60,000 people die annually, with the highest burden in Asia and Africa. Vaccination of domestic dogs and public education have dramatically reduced human mortality in the Americas and South America, where annual cases now hover in the single digits.
In regions lacking resources, the high cost of the vaccine and the need for cold‑chain storage impede widespread immunization. Organizations such as Gavi provide funding to establish refrigeration and canine vaccination programs, aiming to eliminate rabies deaths from dog bites worldwide by 2030. The evidence from the Americas demonstrates that sufficient investment in dog vaccination can virtually eradicate human rabies.
