The emergence of SARS CoV-2 pandemics triggered a worldwide-scale implementation of measures that seriously impacted the circulation of respiratory syncytial virus (RSV), as demonstrated inter-seasonal RSV epidemics in some southern hemisphere countries and late off-season outbreaks in several European countries and USA.In a multi-country longitudinal observation study, involving 18 countries that enforced non-pharmaceutical interventions (NPIs) to reduce the spread of SARS CoV-2, You et al found that all countries experienced delayed RSV onset and, based on data available by September 2021, in 61% there was a RSV rebound delayed by a range of 5 to 54 weeks (1).The first example of shift in RSV seasonality was reported in Australia, in late 2020 and early 2021, with an off-season widespread of RSV infections after