Visualize the spread of viruses and bacteria

I found two very useful videos to visualize the spread of viruses and bacteria.

The first one, produced by Bauhaus-Universit├Ąt Weimar, shows the airflow that is moved when coughing, and what is the difference between coughing in the hand, elbow, or in a mask, normal or surgical. There’s a big difference!

The other is from Mark Rober, again, a Youtuber who, if you read my other posts, I suggested many times. In the video he scatters a dust, visible only with an ultraviolet lamp, on the hands of three children, during a lesson at a primary school. At the end of the lesson he shows the spread of “bacteria” (actually only this harmless powder), and how it spreads with handshakes!

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