The share of virus tests coming back positive in New York State has stayed below 1 percent for 30 straight days, suggesting that the state’s aggressive approach to containing its outbreak — once the most severe in the country — has largely worked.
The state’s positivity rate, announced on Sunday, remained below 1 percent even as parts of the economy gradually reopened, the number of people being tested continued to trend upward, and other states grappled with sharply…