Online Covid-19 Assessment Tools
网上自助新冠筛查问答

* FAQs I Think I Might Have Been Exposed to COVID-19
问答: 我觉得我可能直接接触到新冠

https://www.howardcountymd.gov/LinkClick.aspx?fileticket=KZ1N9sWyBuY%3d&tabid=1931&portalid=0

* CDC Online Covid-19 Assessment Tool/Self-Checker
美国疾控中心网上自助新冠筛查问答

https://www.cdc.gov/coronavirus/2019-ncov/testing/diagnostic-testing.html

* Mayo Clinic Online Covid-19 Self-Assessment Tool  
Mayo 诊所网上自助新冠筛查问答

https://www.mayoclinic.org/covid-19-self-assessment-tool

* CDC COVID-19 Fact Sheet
美国疾控中心关于COVID-19的情况介绍

https://www.cdc.gov/coronavirus/2019-ncov/downloads/2019-ncov-factsheet.pdf