The broader data shows a split between those who started showing symptoms prior to Jan. 18 and those whose symptoms appeared after — with the former waiting muc

The broader data shows a split between those who started showing symptoms prior to Jan. 18 and those whose symptoms appeared after — with the former waiting much longer on average before seeking treatment. The contrast becomes even sharper on Jan. 22, when there was a noticeable jump in the number of patients seeking treatment the day their symptoms showed. What changed on Jan. 22? That was the day the Hubei provincial government finally declared a public health emergency