WHO outlines recommendations to protect infants against RSV – respiratory syncytial virus

Published on June 3, 2025

Today, the World Health Organization (WHO) published its first-ever position paper on immunization products to protect infants against respiratory syncytial virus (RSV) – the leading cause of acute lower respiratory infections in children globally.

Every year, RSV causes about 100 000 deaths and over 3.6 million hospitalizations in children under the age of 5 years worldwide. About half of these deaths occur in infants younger than 6 months of age. The vast majority (97%) of RSV deaths in infants occur in low- and middle-income countries where there is limited access to supportive medical care, such as oxygen or hydration.

Published in the Weekly Epidemiological Record (WER), the position paper outlines WHO recommendations for two immunization products: a maternal vaccine that can be given to pregnant women in their third trimester to protect their infant and a long-acting monoclonal antibody that can be administered to infants from birth, just before or during the RSV season.

“RSV is an incredibly infectious virus that infects people of all ages, but is especially harmful to infants, particularly those born premature, when they are most vulnerable to severe disease,” says Dr Kate O’Brien, Director of Immunization, Vaccines, and Biologicals at WHO. “The WHO-recommended RSV immunization products can transform the fight against severe RSV disease, dramatically reduce hospitalizations, and deaths, ultimately saving many infant lives globally.”

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