The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.

A cloth face mask is a mask made of common textiles, usually cotton, worn over the mouth and nose.

The Wikipedia page on the COVID-19 pandemic provides a comprehensive overview of the ongoing global pandemic caused by the novel coronavirus.

Duke University is a private research university located in Durham, North Carolina, United States.

The Wikipedia page for the European Union provides an in-depth overview of the supranational political and economic organization that consists of 27 member states located in Europe.

Firefighting is a profession aimed at controlling and extinguishing fire.