A vaccine exists for RB51 Brucellosis.

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Multiple Choice

A vaccine exists for RB51 Brucellosis.

Explanation:
There is a vaccine for Brucella abortus RB51 used in cattle. The RB51 vaccine is a live attenuated Brucella abortus strain developed specifically to immunize cattle against bovine brucellosis. It exists and is approved for use in cattle in many countries (including the United States), though its availability and regulatory status vary by jurisdiction. It’s not used in humans. Because the question asks whether such a vaccine exists, the correct answer is true—the existence is established even if its use is not universal.

There is a vaccine for Brucella abortus RB51 used in cattle. The RB51 vaccine is a live attenuated Brucella abortus strain developed specifically to immunize cattle against bovine brucellosis. It exists and is approved for use in cattle in many countries (including the United States), though its availability and regulatory status vary by jurisdiction. It’s not used in humans. Because the question asks whether such a vaccine exists, the correct answer is true—the existence is established even if its use is not universal.

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