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Table 3 Estimated annual number of cases of mild and moderate illness (C90) due to water recreation, by activity, in millions a

From: Estimate of incidence and cost of recreational waterborne illness on United States surface waters

Activity AGI Respiratory Eye Ear Skin
Swimming 29.14 (23.09–34.58) 9.22 (1.29–16.66) --b 6.87 (2.62–10.25) 12.06 (6.99–16.87)
Kayaking 0.54 (0.11–0.97) --b 0.63 (0.04–1.29) --b --b
Rowing 0.38 (0.03–0.76) --b 0.42 (0.03–0.85) --b --b
Canoeing 0.78 (0.15–1.38) --b 0.91 (0.05–1.84) --b --b
Motor boating 4.77 (0.94–8.50) --b 5.59 (0.36–11.31) --b --b
Fishing 15.27 (4.12–25.12) --b --b --b --b
Total 50.95 (36.59–63.42) 9.22 (1.29–16.66) 7.55 (0.49–15.28) 6.87 (2.62–10.25) 12.06 (6.99–16.87)
Moderate Severityc 7.2% 13.7% 10.4% 24.3% 5.4%
  1. a Calculated based on estimated number of water recreation events and the attributable risk of illness, may not sum to estimated totals due to rounding
  2. b No excess illnesses expected, based on the attributable risk
  3. c Percent with moderate severity illness (those who contact their HCP or go to an ED)