A 13-day-old female presents with a runny nose, cough, fussiness, and a temperature of 100°F. What is she at greatest risk of developing?

The infant presents with mild respiratory symptoms, including a runny nose and cough, along with a low-grade fever. In neonates and young infants, especially those who are less than one month old, the immune system is still maturing, which places them at higher risk for severe respiratory conditions.

In this age group, one of the paramount concerns is the potential for apnea and respiratory failure. Apnea, especially in neonates, can often be a manifestation of underlying issues such as respiratory infections, and young infants are particularly susceptible to significant clinical declines due to their immature respiratory control and small airway size.

The other conditions listed, while concerns in the pediatric population, do not present as immediate threats in a well-appearing 13-day-old. For instance, pneumonia could develop as a complication of a viral infection, but at this early age, the likelihood of immediate progression to respiratory failure due to apnea is statistically more significant. Likewise, bronchitis is less common in such young infants, as it primarily affects older children and adults. Asthma typically develops later in childhood and is not relevant to this very young patient.

Thus, considering the age and clinical presentation of the infant, the greatest risk of development is apnea and respiratory failure, requiring close monitoring