I'm not sure that I'm The Stand or 12 Monkey's level of worried .... yet. But I'm getting there.
Well, if you're worried, start following these rules suggested by Italy's health ministery that I think work well for everyone, as simple as they might be.
1. Wash often your hands
2. Avoid close contact with people suffering from breathing infections
3. Don't touch the nose, the eyes or the mouth with your hands
4. Cover the mouth and the nose if you sneeze
5. Don't take antiviral drugs or antibiotics unless prescripted by a doctor
6. Clean surfaces with alcohol or disinfectant products
7. Use a mask only if you're suffering from the disease or you're assisting ill people
8. Products made in China and packages arriving from China are not dangerous
9. Pets are not dangerous
10. Call the medical authorities if you're back from China since less than 14 days (well, this is kinda moot by now, health procedures and instructions given to the population vary from nation to nation)