NEW YORK (CBSNewYork) – A California doctor who came to New York to help fight COVID-19 tweeted a troubling photo of his packed flight home.

Dr. Ethan Weiss traveled from New York to San Francisco on Sunday.

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His photo showed almost every seat on the plane was filled, making social distancing impossible.

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United recently said it would leave middle seats empty in order to comply with the guidelines.

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The airline said, beginning next week, passengers will be notified if their flights are close to capacity, and can either rebook or take a travel credit.