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Sad elderly woman in face mask looks through the window

Woman puts on a mask for protection against coronavirus 2019-nCoV.

Young Man Sneezing or Coughing in Medical Protective Face Mask and Covered Hand on the Street Background. Male Looking at Camera. COVID-19. Pandemic Coronavirus. Spread of flu. Close-Up. Slow Motion

Young Man Sneezing or Coughing in Medical Protective Face Mask and Covered Hand on the Street Background. Male Looking at Camera. COVID-19. Pandemic Coronavirus. Spread of flu. Close-Up. Slow Motion

Elderly man in face mask looks through the window

Serious man putting on medical facemask close-up, big city air pollution concept

Worried man in protective mask on face looking around, high air pollution level

Concerned man putting on facemask in street close-up, ecology problems awareness

Serious man in suit putting on protective mask, seasonal flu epidemic in country

Experienced doctor putting on protective mask, viral disease risk, patient POV

Endocrinologist showing female patient picture with donuts, risk of diabetes