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Weinig RS-virus afgelopen winter; hoe komt dit en wat zijn de verwachtingen voor de komende seizoenen?
ENG: Very little RSV last winter, how can this be explained and what can we expect in the coming seasons?

Summeren, J.J.G.T. van, Hendriksen, J.M.T., Paget, J., Meijer, A. Weinig RS-virus afgelopen winter; hoe komt dit en wat zijn de verwachtingen voor de komende seizoenen? ENG: Very little RSV last winter, how can this be explained and what can we expect in the coming seasons? Tijdschrift voor Infectieziekten: 2021, 16(3), p. 80-85.
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Since the introduction of measures to control the circulation of SARS-CoV-2, there has been very little respiratory syncytial virus (RSV) circulation in Europe.

As it is difficult to predict when RSV will start to spread in the Netherlands, 4 scenarios are presented and described. It is hypothesized that the next epidemic(s) will be larger in size, as the number of children without protective immunity, and therefore more susceptibility for RSV, has increased. Moreover, the epidemic might start outside the winter season.
RSV circulation is only partially affected by the COVID-19 restrictions. It can only stop RSV circulation completely when strict COVID-19 preventive measures apply.

Monitoring RSV infections via surveillance is important, as this data allows general practices and hospitals to be prepared for an increase in the number of RSV patients, especially in children.