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 In IMR, age of infants is considered – and explain in detail?
Infants are children less than 1 year of age.

Infant mortality rate
"The ratio of infant death in a year to the total number of live birth in that year. But it is usually expressed as a rate per 1000 live birth".