How often should you change your mask? Prof Tulio de Oliveira weighs in #ExpertSeries

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How often should you change your face mask? What is up with the second wave in Europe? Where did they go wrong and should we be worried too? Prof Tulio de Oliveira shed more light on this concern as well as other COVID-19 related issues KZN is curious about.
16 Sep 2020 3AM English South Africa Society & Culture · Daily News

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