Severe respiratory syncytial virus disease in Alaska native children

Hospitalization rates for respiratory syncytial virus (RSV) infection range from 1 to 20/1000 infants. To determine the rate and severity of RSV infec tions requiring hospitalization for infants in the Yukon-Kuskokwim (YK) Del ta of Alaska, a 3-year prospective surveillance study was conducted. The an nual rate of RSV hospitalization for YK Delta infants <1 year of age was 53 -249/1000, RSV infection was the most frequent cause of infant hospitalizat ion. RSV disease severity did not differ among non-high-risk infants in the YK Delta and at Johns Hopkins Hospital (JHH), On average, 1/125 infants bo rn in the YK Delta required mechanical ventilation for RSV infection. Durin g the peak season, similar to$1034/child <3 years of age was spent on RSV h ospitalization in the YK Delta. In YK Delta infants less than or equal to 6 months old, RSV micro-neutralizing antibody titers <1200 were associated w ith severe disease (odds ratio = 6.2, P = .03), In the YK Delta and at JHH, newborns may be at greater risk for severe RSV illness than previously tho ught.