[Comment] Challenges of RSV prevention strategy implementation in middle-income countries

Globally, 3·1 million children are hospitalised with respiratory syncytial virus (RSV) lower respiratory tract infection (LRTI) annually.1 The incidence of RSV LRTI per 1000 children per year in upper-middle-income countries (130·8; uncertainty range [UR] 56·8–300·8) and lower-middle-income countries (106; UR 63·5–177) is similar to, if not higher than, that of low-income countries (75·9; UR 42·7–134·7).2