The images showed the hands at different stages of cleanliness including “before washing”, after a “rinse and shake”, with “six seconds and no soap” and “30 seconds with soap”.

Washing your hands properly should take as long as singing "Happy Birthday" twice Stay up to date with notifications from The Independent Notifications can be managed in browser preferences.

Coronavirus; Coronavirus: How to wash your hands; viral video using black paint shows why it’s important to follow all the steps. Published: ; Mar. 23, 2020, 1:01 p.m.

Students touched the pieces of plain white bread with dirty hands, after washing with soap and water and after using hand ... with two large patches of yellow and green mold beginning to turn black.