Health officials in northern Nevada say current coronavirus trends mirror those that led to some of the worst of the pandemic and foresee the possibility of closing schools or limiting business capacities again if the steep trajectory of new cases doesn’t begin to flatten soon. Test positivity, a benchmark measure of community spread of the virus, has risen in Nevada from a low of 3.4% in mid-May to 16.3% on Monday. Driven primarily by the spread of the delta variant, Washoe County Health District Officer Kevin Dick said the positivity rate in the Reno-Sparks area has risen from 5% in mid-July to 15.4% on Tuesday.