- Article
- Source: Campus Sanofi
- May 20, 2025
RSV
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RSV Is Seasonal, With Peak Incidence Varying by Region1,2
- Temperate countries in the Northern Hemisphere generally experience the start of the RSV season between September and January.
- Those in the Southern Hemisphere generally experience the start of the RSV season between March and June, closely aligned with colder temperatures.
- The seasonality of RSV in (sub)tropical climates appears less consistent—with studies indicating peak of RSV season closely aligns with the rainy season and/or higher temperatures.
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RSV is a highly transmissible viral disease
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- RSV is transmitted by respiratory droplets and considered “highly contagious”9-11
- R0 of 4.5
mean R0 ranging from 1.7 to 8.212
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RSV shedding in Infants, toddlers and immunecompromised
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Duration of Virus Shedding in Infants and Toddlers
Duration of Virus Shedding in Immunecompromised patients
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Takeyama A et al J Med Virol. 2016 Jun;88(6):938-46. doi: 10.1002/jmv.24434. Epub 2015 Dec 1. PMID: 26588816.
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Lehners N, et al.. PLoS One. 2016;11(2):e0148258. Published 2016 Feb 11.doi:10.1371/journal.pone.0148258
Most Infants Are Exposed to RSV Infection in the Community and Through Other Children1-3
Crowding and day-care exposure significantly increased the risk of severe RSV disease4-6
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Crowding and day-care exposure significantly increased the risk of severe RSV disease4-6
In the United States, more than 50 per cent of under-ones are in some form of childcare; ~75% from the age of 4 months7
Network showing the sources of infection to the infant, as identified by social relationships in Kenya.1 The size of the circles is proportional to the number of cases.
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Adapted from Kombe IK, et al. Sci Rep. 2021;11(1):1463.
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Colosia, A.D et al. BMC Infect Dis 12, 95 (2012). https://doi.org/10.1186/1471-2334-12-95
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Unicef report card 8;The child care Transition ,A league table of early childhood education and care in economically advanced countries rc8_eng.pdf (unicef-irc.org)
MAT-BH-2300123-V1-November 2024