Chat about Novel Coronavirus - 2019-nCoV - COVID-19

The following explains the most optimistic scenario in which a person has symptoms:

Day 1: Exposure
Day 5: Symptoms start
Day 6-16: 10-day self-isolation period (including when you get a Covid test)
Taking the December calendar into consideration, it means that, to be out of self-isolation on Christmas Eve morning, the last day you could be infected is December 8.

Taken from a Sun article, admittedly, but the numbers stack up.