"national syndromic surveillance program (nssp): emergency department visits percentage of visits for covid-19-like illness (cli) or influenza-like illness (ili) september 29, 2019 - april 4, 2020 data as of april 9, 2020"
"national syndromic surveillance program (nssp): emergency department visits percentage of visits for covid-19-like illness (cli) or influenza-like illness (ili) september 29, 2019 - april 4, 2020 data as of april 9, 2020"