WHO: COVID-19 vaccine efficacy, effectiveness and protection

| February 4, 2022

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The World Health Organization (WHO) has a series of plain language resources that explain the what, how, and why of vaccines. The resource “vaccine efficacy, effectiveness and protection” answers the following questions:

  • What is vaccine efficacy and how is it different from vaccine effectiveness?
  • Why do we need to get multiple doses of the vaccine?
  • Why should we get the vaccine if we can still get sick when we are fully vaccinated?
  • Is getting vaccinated all we need to do to stop COVID-19 infection and transmission?
  • Will the vaccine protect us against COVID-19 variants?

The resource is available in Arabic, English, French, Mandarin, Spanish, and Russian. It can be accessed at this link: https://www.who.int/news-room/feature-stories/detail/vaccine-efficacy-effectiveness-and-protection