These materials are regularly updated based on new scientific findings as the pandemic evolves. Last updated December 2021
Masks should be used as part of a comprehensive strategy of measures to suppress transmission and save lives; the use of a mask alone is not sufficient to provide an adequate level of protection against COVID-19.
If COVID-19 is spreading in your community, stay safe by taking some simple precautions, such as physical distancing, wearing a mask, keeping rooms well ventilated, avoiding crowds, cleaning your hands, and coughing into a bent elbow or tissue. Check local advice where you live and work. Do it all!
Make wearing a mask a normal part of being around other people. The appropriate use, storage and cleaning or disposal of masks are essential to make them as effective as possible.
Here are the basics of how to wear a mask:
Find out more about the science of how COVID-19 infects people, and our bodies react, by watching or reading this interview.
For specific advice for decision makers, see WHO’s technical guidance.
When and how children should wear a mask
How to wear a medical mask safely
This guidance provides specific considerations for the use of non-medical masks, also known as fabric masks, by children as a means for source control...