How to Significantly Slow Coronavirus? #Masks4All (Creative Commons license, feel free to share)

EDIT: Big news! WHO is changing its position about face masks. Now, our video and recommendation are both in alignment with the official WHO opinion: EDIT: This video is under Creative Commons license, feel free to share it (please always mention the link to the original YouTube version). Here is the source data of the video for download: EDIT: We have added a new and urgent message from the Minister of Health of the Czech Republic for other healt