Background

Enteroviruses (EV) are found worldwide. In temperate regions such as France, an increase in enterovirus infections is observed every year during the summer and fall. This increase can be seen as early as May but most often occurs in June and July. A summer peak is usually observed in weeks 26 or 27, and a second, smaller peak is often observed during the fall. While most EV infections are mild or asymptomatic, some infections can lead to severe complications, depending on age, the immune system (humoral immune deficiency), or the type of EV.