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{{ANETextoDestacado|titulo=<br>|contenido=The phases in which the analysis of the first wave of the pandemic has been divided is based on the amount of COVID-19 cases registered, i.e. First COVID-19 cases shows data from the beginning of the crisis until 8 March 2020; Rising phase includes data from 9 to 20 March 2020; Downward phase runs from 21 March to 30 June 2020.
Data on the amount of COVID-19 cases were downloaded from the National Epidemiological Surveillance Network website in October 2020. Data on other variables were not available for download at that date, so a specific request had to be made for this publication to the National Epidemiological Surveillance Network. It shall therefore be noted that “all results are provisional and shall be interpreted with care as they only furnish evidence of the information available at the time these data were provided”.
For the analysis of COVID-19 cases, the amount of cases by symptom onset date as well as the province of residence have been taken into account as follows: “the symptom onset date has been used from the start of the pandemic up to 10 May. From 11 May onwards, when the symptom onset date is not available, the diagnosis date minus 3 days is used in general, and the diagnosis date itself is used if no symptoms are perceived” (National Epidemiological Surveillance Network).
