FLAGSTAFF, Ariz. – Coconino County Health and Human Services (CCHHS) has confirmed the first presumptive positive case of COVID-19 in Coconino County March 18. The test was conducted by TGen North Clinical Laboratory.FLAGSTAFF, Ariz. – Coconino County Health and Human Services (CCHHS) has confirmed the first presumptive positive case of COVID-19 in Coconino County March 18. The test was conducted by TGen North Clinical Laboratory.