San Francisco is in a state of emergency as confirmed coronavirus cases hit 18. Here's everything we know, and the steps the city is taking to address the outbreak.

· The coronavirus disease has upended plans and changed the way people and companies behave in San Francisco.
· San Francisco declared a state of emergency in February, banned large gatherings exceeding 100 people, and has placed handwashing stations around the city to promote good hygiene practices.
· There are now 18...