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Know the nuances of vaccine efficacy when covering COVID-19 vaccine trials

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it’s important to understand how vaccine efficacy is calculated, and other aspects of efficacy that can ensure your reporting on vaccine trial results is precise and accurateI’ve written in previous posts about what to look for in COVID-19 vaccine trials and red flags to monitor. The two most important outcomes in vaccine trials are the vaccine’s safety and its efficacy. Recall that efficacy is different from effectiveness: efficacy refers to how well the vaccine prevents infection in the clinical trial, with effectiveness referring to how well it prevents infection in the real world with a broader and more diverse population. Continue reading →

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.