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A golden lion tamarin is held by researchers after it was vaccinated against yellow fever in a lab run by the nonprofit Golden Lion Tamarin Association in the Atlantic Forest region of Silva Jardim, Rio de Janeiro state, Brazil, Monday, July 11, 2022. While authorities elsewhere have inoculated animals to safeguard human health – vaccinating feral dogs and wild animals such as raccoons for rabies and other diseases – it's still very rare for scientists to administer vaccine injections to directly protect an endangered species. (Photo by Bruna Prado/AP Photo)
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