Table 3. Estimated seasonal incidence per 10,000 persons and 95% confidence limits (CL) of medically attended RSV (total, A or B) in adults ≥50 years old by season, gender and age group, in a Marshfield Wisconsin community cohort, 2006–07 through 2009–10.
| Seasonal Incidence/10,000 (95% CL) | |||
| RSV | RSV A | RSV B | |
| Overall | 154 (132,180) | 80 (64,100) | 74 (59,93) |
| Season | |||
| 2006–07 | 110 (75,161) | 69 (42,112) | 41 (21,80) |
| 2007–08 | 179 (132,244) | 86 (53,138) | 93 (61,143) |
| 2008–09 | 166 (125,221) | 33 (16,67) | 133 (97,184) |
| 2009–10 | 159 (122,208) | 131 (97,177) | 28 (15,54) |
| Gender | |||
| Male | 127 (99,163) | 65 (46,93) | 61 (42,89) |
| Female | 178 (147,216) | 93 (70,124) | 85 (64,113) |
| Age Group | |||
| 50–59 years | 124 (99,156) | 59 (42,83) | 66 (47,91) |
| 60–69 years | 147 (110,196) | 87 (59,130) | 59 (37,94) |
| ≥70 years | 199 (153,258) | 102 (70,149) | 97 (65,143) |