Children should wear a well-fitted mask that overs the nose, mouth and chin .
472
这能控制病源，也就是说，如果儿童感染了病毒但并不知道本人已感染了病毒，可以防止他们将病毒传给他人。
There are three types of masks that WHO recommends for the public*: reusable non-medical masks that comply with standards disposable medical masks other types of reusable non-medical masks, including homemade multi-layered (fabric) masks are acceptable when other options are not available.
473
向儿童提供口罩的成年人应确保织物口罩尺寸适当，能充分覆盖儿童的鼻子、嘴巴和下巴。
*More on the types of masks, how to choose them, and how to wear them is available here: https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/when-and-how-to-use-masks
474
儿童应如何戴口罩？
How should childrenwear a mask?
475
儿童佩戴口罩原则与成人相同。
Adults and children should follow the same principles for safe mask wearing.
476
例如，在戴口罩前，使用含酒精成分的免洗洗手液擦手至少20秒，如果使用肥皂和水洗手，则至少40秒。
Some children may not be able to properly wear a mask without help or supervision.
477
确保口罩尺寸适当，能够遮盖鼻子、嘴巴和下巴。
Parents or caregivers who help children with masks should be prepared to talk about mask safety and help children understand how to wear masks properly.
478
应教儿童如何正确佩戴口罩，例如不要触摸口罩正面，不要将口罩拉到下巴下面或嘴里。
If you are helping a child to put on or take off a mask, be sure to follow the same steps when you put on and take off your own mask.
479
应将口罩放在包里或袋子中。
Children should be encouraged to clean their hands before putting on their mask and after taking it off and to wear a well-fitted mask that covers the nose, mouth and chin.