24/01/2021
Swiss Cheese model to prevent COVID 19
Remember that the vaccine is an important intervention to prevent the spread of the virus but it remains only one of our strategies for prevention. It is still very essential to build barriers using other strategies including social distancing, use of masks and hand sanitizers etc.
Swiss cheese model of pandemic defence:
The metaphor is easy enough to grasp: multiple layers of protection, imagined as cheese slices, block the spread of the new coronavirus, Sars-CoV-2, the virus that causes Covid-19. No one layer is perfect; each has holes, and when the holes align the risk of infection increases. But several layers combined – social distancing, plus masks, plus hand-washing, plus testing and tracing, plus ventilation, plus government messaging – significantly reduce the overall risk. Vaccination will add one more protective layer.