covid-19 Coronavirus coronavirus vaccines

The difference between COVID-19 vaccine efficacy and effectiveness

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globalnews.ca

COVID-19 vaccines, health officials are advising to take the first one made available to you despite its efficacy rate.Experts say a vaccine’s effectiveness and efficacy are two different things.Efficacy refers to how well a drug, in this case, a vaccine, works under controlled circumstance such as a clinical trial.

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