Pedestrians shop in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus. (Photos: Xinhua)

Pedestrians shop in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus.

Pedestrians shop in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus.

Pedestrians shop in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus.

Pedestrians walk on the street in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus.

Pedestrians walk on the street in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus.

Pedestrians walk on the street in Brooklyn, New York, on Friday after US President Donald Trump said that the Centers for Disease Control and Prevention recommend people use "cloth masks" to protect their faces to block the spread of the novel coronavirus. (Compiled by Wu Qingyang)