key: cord-1049867-k2t0zm64
authors: Chirico, Francesco; Nucera, Gabriella; Szarpak, Lukasz
title: COVID-19 mortality in Italy: The first wave was more severe and deadly, but only in Lombardy region
date: 2021-05-14
journal: J Infect
DOI: 10.1016/j.jinf.2021.05.006
sha: 2fe939feed8938f08ccd12c10de464ff4e6c9dc6
doc_id: 1049867
cord_uid: k2t0zm64

nan

Letter to the editor COVID-19 mortality in Italy: The first wave was more severe and deadly, but only in Lombardy region Francesco The manuscript has not been published or accepted by other journals for publication.

COVID-19 mortality in Italy: The first wave was more severe and deadly, but only in Lombardy region

We read with great interest the work by Bongiovanni et al. 1 , who by comparing patients admitted to emergency room of ASST Rhodense, in Lombardy region, during the first wave (2-8 March 2020) and the second wave (19-25 October 2020), concluded that "the severity and the mortality of COVID-19 infection was lower during the 2 nd wave of pandemic". Their findings confirm those found in a similar research by Borghesi et al., in Lombardy region 2 . Despite both these studies have similar relevant limitations, which are the lack of comparison with the final outcome, since the studies were carried out at the beginning of the COVID-19 second wave, and the fact that a "relatively small number of cases is not sufficiently representative of such a large target population" 2 , they are well representative of the situation in Lombardy region, where official figures show 16,362 deaths (47.7% of all deaths in Italy) during the first wave (March-May 2020) and 15.515 deaths (18.9% of all the deaths in Italy) during the second and the third wave together 3 . However, Lombardy is just one of the twenty Italian regions. Therefore, the conclusion reached by Bongiovanni et al., that "in the second wave the mortality of COVID-19 pandemic was lower", is ambiguous and misleading, and, therefore, deserves to be clarified. Their statement, indeed, is true for Lombardy, but it cannot be generalized to the rest of Italy, where the total number of deaths was 34,260 during the first wave (from 21 February 2020 to 11 June 2020) and 38,535 during the second wave (from 14 September 2020 to 31 December 2020) 4-6 . This opposite trend of deaths between Lombardy and the rest of Italy deserves to be highlighted and explained. Probably, this difference is due to the fact that many Southern Italian regions, which were spared by the first wave, were the hardest hit during the second wave. This was due in part to the relaxation of the severe lockdown measures 7 put in place in the context of the first strict and generalized lockdownone of the world's longest and severe in Europe -which has been credited with getting the first wave under control 8 . But this difference was also due to a decentralized national healthcare service that has generated different regional responses, in terms of hospital capacity and strategy, to the COVID-19 emergency 9 .

Authors declare no financial support for this study.

None

Differences between the waves in Northern Italy: how the characteristics and the outcome of COVID-10 infected patients admitted to the emergency room have changed

Northern Italy: COVID-19 second wave less severe and deadly than the first? A preliminary investigation

Characteristics of COVID-19 patients dying in Italy

Available from: Coronavirus Update (Live): 123,555,602 Cases and 2,723,780 Deaths from COVID-19 Virus Pandemic -Worldometer (worldometers

Estimating case fatality ratio during COVID-19 epidemics: Pitfalls and alternatives

Covid-19 pandemic in Italy: Pros and cons

Coronavirus disease 2019: the second wave in Italy

COVID-19: from hospitals to courts