Because NY was distorting US stats, this shows the pattern of US less NY. As we can see, if we peg 8 future days to Italy (they are 8 days ahead of us), then our pattern begins to flatten out as well. Again, key caveat is that NYC might still be growing (rapidly), but this also suggests regionality ie high specificity.
Italy 60.5 IT v US USA-NY 310.9 Day Date Cum Total % Chg Daily Ratio Date Cum Total % Chg Daily 1 2/21/2020 1 1 1.0 2/29/2020 1 1 30 3/21/2020 4,825 19.7% 793 3.9 3/29/2020 1,237 19.7% 203 31 3/22/2020 5,475 13.5% 650 3.9 3/30/2020 1,404 13.5% 167 32 3/23/2020 6,077 11.0% 602 3.9 3/31/2020 1,558 11.0% 154 33 3/24/2020 6,820 12.2% 743 3.9 4/1/2020 1,749 12.2% 191 34 3/25/2020 7,503 10.0% 683 3.9 4/2/2020 1,924 10.0% 175 Gross differential 3.9 Population differential 5.1 Per capita differential 20.0 Growth rate 26 Days 35.1% 28.2% 34 Days 30.0% 24.9% Sources https://en.wikipedia.org/wiki/2020_coronavirus_pandemic_in_the_United_States https://en.wikipedia.org/wiki/2020_coronavirus_pandemic_in_Italy
Just look the logarithmic plot on Worldometer for Italy and Spain. Thus begins the flattening.