One of these things is not like the other. Why is the US CDC official symptom list, and all the testing that is based on it, so incomplete?

US CDC symptom list as of 3/31/2020 is limited to “fever, cough, shortness of breath.” Source – click on symptoms if not displayed: 

www.cdc.gov/coronavirus/2019-ncov/symptoms-testing/symptoms.html

World Health Organization symptom list as of 3/31/2020 – in a Q&A posted 3/09/2020 – is much longer – click on “What are the symptoms of COVID-19” at 

www.who.int/news-room/q-a-detail/q-a-coronaviruses