Final answer:
RSV infections in infants can be life-threatening.
Step-by-step explanation:
The correct statement is that RSV infections in infants can be life-threatening. Respiratory syncytial virus (RSV) infections are fairly common in infants, and most people have been infected by the age of 2 years. RSV can cause a range of symptoms from mild cold-like symptoms to severe pneumonia. In infants, RSV infections can be particularly dangerous and require medical intervention.