Coronavirus World Map: Tracking The Spread Of The Outbreak NPRCoronavirus transmission: how COVID-19 spreads and how you can protect yourself NetdoctorChina Created a Fail-Safe System to Track Contagions. It Failed. The New York TimesCoronavirus: Scientists suggest theory that COVID-19 has lived inside humans for years Yahoo News UKNew study sheds light on coronavirus infection mechanism The GuardianView Full Coverage on Google News