"Woman, 42, wearing a facial mask"

Dentist wearing a face mask and holding a drill

"Dentist, dental hygienist, wearing a face mask and magnifying loupes"

"Person with Venetian bird mask wearing a bowler hat, Venice, Italy, Europe"

"A man and a woman wearing sun protective clothing, Hua Hin, Thailand, Asia"

"Dentist, dental hygienist, wearing a face mask and adjusting a dentist's lamp"

"Steelworker wearing a gold plated protective mask, steel recycling demonstration, IdeenPark 2012, a technology and education summit conference for young people, Essen, Ruhr area, North Rhine-Westphalia, Germany, Europe"

"Performer wearing a Baroque Venetian mask, Venezianische Messe, Venetian festival, Ludwigsburg, Baden-Wuerttemberg, Germany, Europe"

"Dentist, dental hygienist, wearing a face mask in a treatment centre while holding a mirror and a drill"

Woman with face mask, portrait, corona crisis, Stuttgart, Baden-Württemberg, Germany, Europe

Woman with face mask, portrait, corona crisis, Stuttgart, Baden-Württemberg, Germany, Europe

Woman putting on a face mask, portrait, corona crisis, Stuttgart, Baden-Württemberg, Germany, Europe

A surgeon in green medical scrubs with arms crossed

researchers and the science

Close-up of an ice hockey player wearing a mask

Close-up of an army soldier wearing a gas mask

researchers in the Lab

Portrait of a female technician standing in a laboratory

Scientist pouring liquid from one conical flask to another

Montage illustration about nanotechnology containing a nanohazard symbol, molecules and a researcher

Portrait of a crossing guard

Montage illustration showing global diseases containing a mosquito, person in face mask, chicken, globe, and a person in hazardous materials suit

A masked bank robber with sack of money, on blue background

Two surgeons performing surgery on a piece of paper

"Scientist wearing a protective mask, portrait"