Over the past few days, the EuroMOMO hub has received many questions about the weekly all-cause mortality data and the possible contribution of any COVID-19 related mortality. Some wonder why no increased mortality is observed in the reported mortality figures for the COVID-19 affected countries.The answer is that increased mortality that may occur primarily at subnational level or within smaller focal areas, and/or concentrated within smaller age groups, may not be detectable at the national level, even more so not in the pooled analysis at European level, given the large total population denominator. Furthermore, there is always a few weeks of delay in death registration and reporting. Hence, the EuroMOMO mortality figures for the most recent weeks must be interpreted with some caution.Therefore, although increased mortality may not be immediately observable in the EuroMOMO figures, this does not mean that increased mortality does not occur in some areas or in some age groups, including mortality related to COVID-19.