Your browser is ancient!
Upgrade to a different browser to experience this site.

Skip to main content

The World & COVID-19

The Swiss Cheese Metaphor: Protecting Ourselves and Others from Coronavirus

When it comes to COVID-19, no single protection — like wearing masks, washing your hands, or social distancing — is 100% effective at preventing infection. The ‘Swiss cheese’ metaphor helps explain how stacking these practices together can help us protect ourselves and others, and reduce the spread of the virus, as states reopen and we return to public spaces, family, and friends. For more information on coronavirus, please visit: