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Latent infection

Up to half of those cats which apparently recover from FeLV infection undergo latent infection in bone marrow. Virus release from latent infections is generally too low to be detected or to infect epithelial cells, and latently infected cats are therefore rarely sources of infection to other cats. Latent virus can, however, be induced to replicate by, for example, corticosteroid treatment. Even latent infections are usually eliminated, although around 10% of cats can remain latently infected for at least three years.

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