As you travel the streets of any city, especially in these days, you'll see a variety of respiratory protection.

特别是这些日子里，在任何城市的街道上，你都能看到各种方式的呼吸保护措施。

So that's why most PPE in healthcare settings tends to focus around respiratory protection, protecting what comes into your lungs.

这就是为什么大多数医疗环境中的个人防护设备倾向于专注呼吸保护，防止有害微生物进入肺部。