RSV infection occurs during which season?

• A. Fall months
• B. Winter months
• C. Spring months
• D. Summer months

Answer: (B)

RSV shows a seasonal pattern in temperate climates, with outbreaks beginning in late fall, peaking in winter, and tapering off in spring. This peak in winter happens because people spend more time indoors and the cooler, drier air helps the virus spread and survive longer. As a result, most RSV infections and related hospitalizations occur during winter, making winter the season with the highest activity. Fall can have some activity, but it’s not the peak, and summer has relatively low activity. (In tropical regions, the pattern can be more year-round, but for temperate climates the winter peak is the typical expectation.)