Why Swiss cheese? The key is layers. While there are holes in slices of Swiss cheese, by combining the slices, we get a layered approach that leads to fewer holes. The same is true for COVID-19 prevention strategies.
The strongest protection comes from getting vaccinated. You also protect yourself by wearing a mask, social distancing, avoiding crowds, and washing your hands often. Each of these are important ways to reduce your risk of getting COVID-19, but they become really effective when you combine them. So, when heading out to work, to the store, or when around others, remember Swiss cheese. Get vaccinated. Wear a mask. Wash your hands often. The more steps you take, the safer you will be against COVID-19. If we do these things, we’ll put COVID-19 behind us
https://uihc.org/2019-novel-coronavirus-covid-19
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