The category "Infants" refers to a demographic classification that focuses on the earliest stage of human life, typically from birth to two years. It encompasses various ethnicities, indicating the diverse racial and cultural backgrounds of these young individuals. The term 'colleagues' in this context, may suggest a group of professionals or researchers working together in the field of infant care or studies. Age groups, in relation to infants, refers to specific intervals in the infant's growth and development, such as newborn, 0-3 months, 3-6 months, and so on. Lastly, 'people' in this category signify the broader classification of the human population that includes infants.