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Risk ratio for respiratory syncytial virus (RSV) infections in older adults (age ≥ 60 years) in serogroup A vs. serogroup B with lower respiratory tract diseases (LRTD) with 3 signs/symptoms or more in follow-up studies (I2 0.0%, 95% CI 0.0 to 89.6; tau2 1.167, 95% CI 0.0 to 59.266; Q = 6.29, p = 0.043) [48,61,85].
