Most of the people involved in Santa Clara County’s suspected cases either recently traveled to Asia - where the disease is most prevalent - or were in contact with people who did.
People just need to calm down! Unless you have travelled to Asia or been in contact with someone who has and is sick, your cjances of contracting this disease are almost nil. Public health people are on very high state of alert on this, folks and when they get a case, they are going to be all over finding out where their patient could have gotten it and finding out who they could have transmitted it to.
The best thing you can do is practice strict personal hygiene and keep your immune system in good shape.