The case doubling rate is fairly constant at doubling every two days...
Date. Cases Doubled #days
27-Feb...15...01-Mar...2.5
28-Feb...19...01-Mar...2
29-Feb...24...02-Mar...2
01-Mar...42...03-Mar...2
02-Mar...57...04-Mar...2
03-Mar...85...05-Mar...2
04-Mar...111...06-Mar...2
05-Mar...176...07-Mar...2
06-Mar...252...08-Mar...2
07-Mar...351...09-Mar...2
08-Mar...475
09-Mar...702 <—2030 hrs Eastern time zone on 3/9/20
10-Mar
11-Mar
12-Mar
13-Mar
281 new cases and 5 new deaths in Spain [source]
881 new cases and 54 new deaths in Iran [source]
The US is way behind in testing, but catching up. We can expect a very significant rise in cases the next few weeks as testing capacity increases.
It will only validate what we’ve known for a while—that COVID has been circulating in some areas of the country for weeks.