COVID-19 transmission: droplet, contact, or aerosol?

There has been lots of recent controversy about the transmission route(s) of COVID-19. Some argue that, like influenza, droplet transmission is the most important route. Others that contact transmission is most important. And others still that aerosol transmission is the key – and that this has been underplayed, so fuelling the pandemic. There is undoubtedly…

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Face masks, face shields, and preventing the spread of COVID-19

The SARS-CoV-2 virus that causes COVID-19 is primarily spread by respiratory droplets, although other routes of transmission (including contact with contaminated people and surfaces) play a role too. One of the most important ways to prevent the spread of the respiratory droplets that transmit SARS-CoV-2 is through physical distancing. Where this is not possible, respiratory…

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