Graffiti on a grey high school wall in the Senegalese capital of Dakar shows people in face masks, others coughing into their elbows and, a bit further on, hands reaching for sanitiser. "Duma virus," says a message in Wolof, a local language. "I am not a virus."

The street art is aimed at educating people about Covid-19, as well as de-stigmatising the virus...

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