Tackling COVID-19 misinformation. Ensuring communities have access to lifesaving public health information from trusted sources and are not misled by misinformation is essential to ending the COVID-19 pandemic. In an effort to empower doctors and nurses – some of the most effective and trusted messengers of public health information – to actively address COVID-19 misinformation and build vaccine confidence globally, the WHO welcomes this social media toolkit for healthcare practitioners, developed by the Government of the United Kingdom. This toolkit aims to provide healthcare workers with the tools, skills and content needed to effectively share authentic and reliable information online. Centered around three core vaccine confidence messages, Vaccine Safety, Vaccine Development and Vaccine Reducing Risk of Sickness; this toolkit sets out three approaches: creating your own posts, posting the images and videos provided in the toolkit, or resharing vaccine information from trusted sources.