How many monkeys are killed each year from animal testing?

The exact number of monkeys killed each year due to animal testing can vary widely and is difficult to determine, as reporting practices differ by country and institution. However, estimates suggest that thousands of monkeys are used in research annually, with a significant portion of these animals facing euthanasia after experiments. Regulatory frameworks in some regions aim to reduce the number of animals used in testing, but the figures remain concerning. Overall, the use of monkeys in research raises ongoing ethical debates about animal welfare.