Which of the following is a sign of serious illness in infants?

Flushed or pale skin in infants can be a significant indicators of serious illness, as it often suggests an underlying medical condition that requires attention. Flushed skin may indicate fever or an infection, while pale skin could point to issues like anemia, circulatory problems, or other serious health concerns. Infants can be particularly vulnerable, and any noticeable changes in skin color warrant closer observation and, when necessary, medical evaluation to ensure their well-being.

In contrast, high energy levels and regular feeding patterns typically indicate a healthy infant. Energetic behavior suggests that the child is feeling well and engaging actively with their environment. Similarly, consistent feeding patterns demonstrate that an infant is receiving adequate nutrition and hydration, which is essential for growth and health. Normal respiratory rates reflect stable and adequate oxygenation of the body, signaling that the respiratory system is functioning properly. Thus, these choices do not indicate signs of serious illness.