How to beat COVID-19 with ‘Swiss cheese’
Each of the measures shown in the figure here--the "Swiss cheese model of prevention"--lowers the probability that an infectious dose of virus will find its way to your respiratory tract and, if it does, will actually cause an infection. Also, depending on the effectiveness and extent of vaccine administration, vaccination could make some of the other interventions superfluous. Such strategies are the essence of preventive medicine. Many of us take drugs to lower our cholesterol levels or blood pressure to reduce the...