Why are there yellow dot stickers on the front doors of businesses in Russia?

Why are there yellow dot stickers on the front doors of businesses in Russia? - Modern taxi cars driving on road with crosswalk

In both Moscow and Saint Petersburg, I’ve seen many/most businesses with a yellow dot sticker on the front door. Right in the center, around 10cm or less in diameter. What does it mean and why is it there?

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Pictures about "Why are there yellow dot stickers on the front doors of businesses in Russia?"

Why are there yellow dot stickers on the front doors of businesses in Russia? - Colorful modern taxi cars on city road
Why are there yellow dot stickers on the front doors of businesses in Russia? - Modern house facade with canopy against stairs in town
Why are there yellow dot stickers on the front doors of businesses in Russia? - Staircase with metal railings near entrance door of white and yellow building located near asphalt road and pavement





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