Why Do Bats Carry So Many Viruses Without Becoming Ill?
- 演化之聲
- Mar 15
- 4 min read
Bats occupy a unique position among mammals. They are the only mammalian group capable of sustained powered flight, and many species have also evolved echolocation to navigate and locate food. For decades, bats have been recognized as hosts of numerous zoonotic viruses. Rabies virus, Marburg virus, Nipah virus, and many coronaviruses have all been linked to bats. Yet infections in bats rarely produce obvious pathological symptoms. Instead, viruses can continue replicating and evolving within bat hosts, eventually giving rise to viral variants capable of infecting other species. In this sense, bats can function as natural reservoirs of viruses. In addition, studies have shown that bats develop cancer far less frequently than humans, suggesting that they possess biological mechanisms capable of counteracting both infectious diseases and tumor formation. These observations have sparked considerable scientific curiosity.
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