"South Korea on Tuesday <4/21/20> reported nine new infections of the coronavirus and one more death, bringing its totals to 10,683 cases and 237 deaths." South Korea's population is 51.2 million.
On April 2, South Korea reported 101 new cases, down from a high of 909 infections in a single day in late February, according to the Al Arabiya News Agency.
If this model holds for the US, and let's hope it does, perhaps the risk of a second wave is being overstated after the lifting of restrictions.
South Korean baseball preseason underway in empty stadiums