Photo de stock - face mask, with filter pm 2.5. Flu epidemic, dust allergy, protection against virus. Covid 19 virus concept. A carbon filter respirator hangs on the handlebars of a bicycle in a forest.

Photo de stock: face mask, with filter pm 2.5. Flu epidemic, dust allergy, protection against virus. Covid 19 virus concept. A carbon filter respirator hangs on the handlebars.

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