1) 70% of the population over 18 has had at least one dose of vaccine, and
2) new cases are under 5,000 per day, and
3) hospitalizations are below 3,000.
According to the CDC, 246.8 million doses have been administered. 40.6% of the population over 18 is fully vaccinated, and 56.3% of the population over 18 has had at least one dose (145.3 million people over 18 have had at least one dose).
And check out COVID Act Now to see how each state is doing.
This graph shows the daily (columns) 7 day average (line) of positive tests reported.
Note: The ups and downs during the Winter surge were related to reporting delays due to the Thanksgiving and Christmas holidays.
This data is from the CDC.
The second graph shows the number of people hospitalized.
The CDC cautions that due to reporting delays, the area in grey will probably increase.