%0 Journal Article %A Grabowski, Jakub %A Witkowska, Natalia %A Bidzan, Leszek %T Letter to the editor: Excess all-cause mortality during second wave of COVID-19 – the Polish perspective %D 2021 %J Eurosurveillance %V 26 %N 7 %P 2100117 %R doi:https://doi.org/10.2807/1560-7917.ES.2021.26.7.2100117 %K Europe %K public health %K epidemiology %K COVID-19 %U https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.7.2100117