How does China test patients for covid-19?
A sudden surge in the number of novel coronavirus cases in China has put a spotlight on the ways patients are tested for the illness, from lung imaging to uncomfortable lab tests that are not always accurate.
On Thursday, China saw its largest one-day jump in confirmed cases — adding over 15,000 — after health officials in Hubei province, the epicentre of the outbreak, changed their counting criteria to include those "clinically diagnosed".
Here's a look at what that means and how testing for the COVID-19 illness works in China:
How does China test for COVID-19?