You only get infected if you have contact with someone infected, it is like the flu, that is not out there in the air infecting people because if it is more the virus dies super fast if it is not in a living organism.
The “incubation period” means the time between catching the virus and beginning to have symptoms of the disease. Most estimates of the incubation period for COVID-19 range from 1-14 days, most commonly around five days. These estimates will be updated as more data become available
in my city at least the measures have been taken well and so far there is no infected. the problem is that the rest of the country seems to have quarantined at first as at stake and in the main cities there are quite a few cases.