U00-U49: Provisional assignment of new diseases of uncertain etiology or emergency use

U46: Emergency use of U46

The U46 category of the ICD-10 includes conditions of public health emergency resulting from certain viral strains. These medical conditions are usually invoked during health emergencies when a new or novel virus is identified as a threat to public health, and it is yet to have a code specifically assigned to it. Many of these viruses are transmitted between humans through respiratory droplets, direct contact, or touching infected surfaces and later touching the eyes, nose, or mouth. Common symptoms generally include fever, tiredness, dry cough, and difficulty in breathing. The diseases can progress to involve several body systems, often culminating in severe respiratory illnesses like pneumonia. It is also notable that the vulnerability and severity of the conditions under this grouping can differ greatly among individuals.