COVID-19: What role for masks, sanitising, and ventilation in the new normal?

South Africa’s fifth wave of COVID-19 infections was comparatively small and is already abating. As with the fourth wave, infection was much less likely to result in hospitalisation or death than in the first three waves. In light of these changes in the pandemic, Aisha Abdool Karim asks what the “new normal” should look like when it comes to mask-wearing, ventilation, hand sanitising, and other preventive measures.

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Herd (Immunity) Today, Gone Tomorrow

There is much talk in South Africa about a ‘second wave’ of COVID-19. In Europe, it is much more than talk, with COVID-19 diagnoses, hospital admissions, and deaths, not to mention ‘restrictions’, all on the rise. Alex Welte places in perspective what we do and do not know about herd immunity and potential second waves.

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COVID-19: What is the risk from waste?

Are waste service workers becoming infected with SARS-CoV-2 through their work? Is handling household waste an occupational hazard? Are the precautionary measures introduced by municipalities sufficient? Professor Wolfgang Preiser explains the science and puts the risks in perspective.

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