If you become symptomatic, immediately self-isolate and contact your county health department or health care provider. Level 2 and cruisesThe CDC has placed Japan under a Level 2 alert due to the coronavirus. If you become symptomatic, immediately self-isolate and contact your county health department or health care provider. Ask your healthcare provider to call the local or state health department. Persons who are placed under active monitoring or facilitated self-monitoring should follow instructions provided by their local health department or occupational health professionals, as appropriate.