You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is International ceificate for travelling is required for - and explain in detail?
- measures designed to restrict the spread of yellow fever are specified in the International Health Regulations of WHO. - all travelling exposed to risk of yellow fever or passing through endemic zones of yellow fever must posses a valid international ceificate against yellow fever before they are allowed to enter yellow fever receptive areas. Reference : Park's textbook of preventive and social medicine, 23rd edition pg no:283 <\p>