Photo: Nick Otto / Special to The Chronicle
Written by: Chase DiFeliciantoino and Mallory Moench / The Chronicle
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As coronavirus concerns cut air links between the U.S. and China, some San Francisco businesses are seeing fewer tourists during an already slow time for visitors.

“This last week has been completely different,” said Steve Sancimino, one of the owners of Nob Hill seafood counter Swan Oyster Depot. An uptick in Super Bowl orders helped a week ago, but now the restaurant, known for its oysters, crab and lunch line, is feeling the impact as the number of visitors from China shrinks.