![](http://www.ecns.cn/hd/2020/04/08/288493c73a6b40ad960fd9e7965f8117.jpg)
A mariachi band delivers a serenade for the medical staff of the National Institute of Respiratory Diseases (INER) during the coronavirus disease (COVID-19) outbreak, in Mexico City, Mexico April 7, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/04/08/42a6d7b120254013b056e81afaeb07c7.jpg)
A mariachi band delivers a serenade for the medical staff of the National Institute of Respiratory Diseases (INER) during the coronavirus disease (COVID-19) outbreak, in Mexico City, Mexico April 7, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/04/08/433c59c610314691adc88ae2e4fffb5e.jpg)
Members of a mariachi band are seen after delivering a serenade for the medical staff of the National Institute of Respiratory Diseases (INER) during the coronavirus disease (COVID-19) outbreak, in Mexico City, Mexico, April 7, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/04/08/da3b4df86f3840d985c4a48881a858d9.jpg)
Members of a mariachi band are seen after delivering a serenade for the medical staff of the National Institute of Respiratory Diseases (INER) during the coronavirus disease (COVID-19) outbreak, in Mexico City, Mexico April 7, 2020.(Photo/Agencies)