Whitney Sandoval, Wichita, KS.

Sedgwick County, KS, COVID-19 Dashboard.

CDC: “Guidance for COVID-19 Prevention in K-12 Schools,” “Demographic Characteristics of People Receiving COVID-19 Vaccinations in the United States.”

Pew Trusts: “Compliance and Defiance: States React to New CDC Mask Guidelines.”

NBC News: “Is the delta variant more dangerous for children? A growing number of kids are very sick.”

Time: “Summer Camps Across the U.S. Are Dealing With COVID-19 Outbreaks. So What Happens When School Starts?”

Katelyn Jetelina, PhD, epidemiologist, University of Texas Health Science Center at Houston School of Public Health, Dallas.

Virological.org: “Viral infection and transmission in a large well-traced outbreak caused by the Delta SARS-CoV-2 variant.”

Yvonne Maldonado, MD, professor of pediatrics (infectious diseases), Stanford University School of Medicine.

Beth Pathak, PhD, co-founder, Coronavirus in Kids (COVKID) Tracking and Education Project.

CNN: “12 of the 20 biggest school districts now require masks in schools. The others can’t because of mask mandate bans.”

Chalkbeat: “NYC to mandate COVID vaccines or testing for teachers.”

ABC7: “LAUSD to require COVID-19 testing for all students, staff regardless of vaccination status.”

Kaiser Family Foundation: “KFF COVID-19 Vaccine Monitor.”

The New York Times: “F.D.A. Aims to Give Final Approval to Pfizer Vaccine by Early Next Month.”

ABC News: “Phoenix Union high schools tells students to mask up, despite Arizona’s statewide ban.”

Daily Beast: “Big Florida, Texas School Districts Rebel, Order Masks in Schools.”