Infectious disease expert Lisa Maragakis explains the importance of wearing a face mask to help prevent #COVID19.
For more information, please visit the #JohnsHopkins Medicine coronavirus website. [ Ссылка ]
![](https://i.ytimg.com/vi/-EywTQ6P0WA/maxresdefault.jpg)
Infectious disease expert Lisa Maragakis explains the importance of wearing a face mask to help prevent #COVID19.
For more information, please visit the #JohnsHopkins Medicine coronavirus website. [ Ссылка ]