One patient takes out fifteen first responders/healthcare workers: https://www.latimes.com/california/s...cy-6-new-cases"The patient tested positive Tuesday and had been placed in isolation at Kaiser Permanente Roseville Medical Center.

The person probably had minimal community exposure between returning from the cruise and arriving at the hospital by ambulance Thursday, health officials said. Ten Kaiser Permanente healthcare workers and five emergency responders, who were exposed before the patient was put in isolation, are now in quarantine.

None of those 15 workers is exhibiting symptoms, officials said."

...and that's part of what makes this disease so pernicious. The system capacity will rapidly diminish if first responders/heath care workers keep getting quarantined.

(This was the now-deceased patient from the Grand Princess cruise ship.)