Hi, understand your anxiety. RSV infections generally occur during fall, winter, and early spring. The timing and severity of RSV circulation in a given community can vary from year to year. If other children in your community show symptoms then it is probable that the infection is present. Usually children show symptoms within 4 to 6 days of infection. Most will recover in 1 to 2 weeks. If his symptoms persist, you should consult your doctor. Regards.