The map is a fine example. Look at the map and look at the recent rise in cases in the past week.
Top ten most new cases per million residents (past week):
State New Cases/mill
North Dakota 8,863
South Dakota 8,124
Montana 6,280
Wisconsin 5,943
Utah 4,800
Idaho 4,567
Nebraska 4,537
Iowa 4,187
Missouri 3,933
Arkansas 3,790
Top ten lowest new cases per capita:
State New Cases/mill
Vermont 210
Maine 336
New Hampshire 762
Hawaii 987
Oregon 1,061
New York 1,066
District Of Columbia 1,074
Washington 1,111
New Jersey 1,127
Some of that is due to achieved levels of immunity in some of those states, but a lot is due to mask wearing (places like Vermont, Maine, New Hampshire, Hawaii, and Oregon still have very little community acquired immunity). If you don't buy the case numbers, here are the death numbers per million over the past week (they lag case numbers by about 2-3 weeks):
Top 10
State New Deaths / mill
North Dakota 146
Arkansas 85
South Dakota 79
Florida 64
Mississippi 60
Missouri 57
Tennessee 56
Kansas 51
Iowa 49
Bottom 10
State New Deaths / mill
Vermont 0
Maine 2
Alaska 5
Wyoming 7
New Jersey 8
Connecticut 9
New York 9
Maryland 11
Oregon 12
Washington 12
The path to herd immunity is a long one. Only a handful of places in New York and New Jersey have realistically achieved it and it takes hitting about 2,000 deaths per million residents to hit it (you can hit it at lower death totals if you do a better job of protecting the elderly than New York did). It will be interesting to see how Sweden performs now that they are back in heating season with their approach.