Well let's see. Since the virus could have infected the person perhaps as long as 3 weeks ago here's my answer. Depending on what that person does for a living most people come in contact with at LEAST 50 people a day and here's the skinny on that:
day 1: 50 people infected
day 2: 2550 + 50 m0re
day 3: 125,000 + 50
day 4: 6,250,000 + 50.
Do the math it's not arithmetic it's exponential!
This so called President has no grasp of what that means and that is startlingly just crazy.