Who need to take a text for coronavirus ? thanks

Depends: Right now depends on where you live and if the disease already spreaded in your comunity. If the virus hasn't spreaded, everyone with the cold symptoms and everyone who has been in contact with an infected person. If the virus spreaded already in your comunity is better to save the test for people suffering from the full disease, so they can be diagnosed and isolated

Policies different: Policies with COVID 19 have differed by country and over time. The CDC has provided guidelines for COVID 19 testing at https://www.cdc.gov/coronavirus/2019-nCoV/hcp/clinical-criteria.html. However, state & local health departments/ providers make actual testing decisions. People should call their health care provider if they believe they should be tested.