Why are children particularly susceptible to upper respiratory infections?

• A. They have stronger immune systems
• B. They are often in close contact with peers in school
• C. They consume more vitamins
• D. They have larger lung volumes

Answer: (B)

Kids are especially prone to upper respiratory infections because these viruses spread most readily in settings where children are in close contact. In school or daycare, kids are together for long periods, talk, cough, and share toys and materials, and often don’t have perfect hand hygiene. All of this creates many opportunities for viruses to pass from one child to another, leading to more infections overall. While a child’s immune system is still maturing, the main reason for higher susceptibility here is the high exposure risk from crowded, close-knit environments. The other ideas—having a stronger immune system, greater vitamin intake, or larger lung volumes—don’t explain why infections are more common in kids.