Coronavirus Cases Skyrocket After Changes In Diagnostic Methods

COVID-19 cases have surged globally, with a significant increase in Hubei province due to expanded diagnostic methods, including CT scans. This has led to faster diagnosis compared to the slower test kits used previously. The US has reported 14 cases, with the latest patient diagnosed under quarantine. The WHO states that containment predictions are uncertain due to limited knowledge about the virus.

What was the reason for the latest patient in the US being diagnosed?

Why can't health officials estimate when containment of the virus might happen?