I'd say that there are several reasons: - Spain's government celebrated the 8 of May parade against recommendations of EU and Madrid regional government [1]. I

I'd say that there are several reasons: - Spain's government celebrated the 8 of May parade against recommendations of EU and Madrid regional government [1]. In 1918 Philadelphia suffered from this mistake [2]. - Spains's government and journalists downplayed the fears to the COVID-19 of people during weeks while Italy was having more than 1k contagions. They also encouraged people to get out, go to bars, etc. Because, "it's only the flu" [3]. - Madrid Barajas Airport has the biggest flow of air traffic in country. - Spain is depopulated but there are a great concentration of people living in Madrid [4] and Madrid hospitals have collapsed (they have a death each 16 minutes [5]) [1] https://www.elmundo.es/espana/2020/03/14/5e6bf851fc6c83330c8b46c7.html https://www.elmundo.es/espana/2020/03/14/5e6bf851fc6c83330c8... [2] https://edition.cnn.com/2020/03/15/us/philadelphia-1918-spanish-flu-trnd/index.html https://edition.cnn.com/2020/03/15/us/philadelphia-1918-span... [3] https://www.rtve.es/noticias/20200225/lorenzo-mila-tve-desde-italia-hablando-del-coronavirus-se-extiende-mas-alarmismo-datos/2004471.shtml https://www.rtve.es/noticias/20200225/lorenzo-mila-tve-desde... [4] https://en.wikipedia.org/wiki/Demographics_of_Spain https://en.wikipedia.org/wiki/Demographics_of_Spain [5] https://elpais.com/sociedad/2020-03-18/lunes-un-muerto-cada-16-minutos-en-los-hospitales-de-madrid.html https://elpais.com/sociedad/2020-03-18/lunes-un-muerto-cada-...