Thanksgiving Food Science, Force of Infection, Food Inequality. Nov 19, 2021, Part 2

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Blunting The Force Of Disease Is Complicated COVID-19 vaccines are highly effective at preventing severe disease. But their efficacy in lab-controlled trials may not exactly correlate to how well they work in the real world. David Kaslow, chief scientific officer at the global public health nonprofit PATH, explains that a factor known as the “force of infection” plays a role in determining how well vaccines work. The force of infection describes the attack rate of a pathogen—the amount of time it takes a susceptible individual to get infected in a given population. In a study recently published in the academic journal NPJ Vaccines, Kaslow and his colleagues found that in vaccine trials for…