-Pima County Health Department director tests positive for COVID-19

-Arizona reports 4,848 new COVID-19 cases, 108 deaths

-Governor expected to tour Phoenix vaccine site

-White Mountain Apache Tribe chairwoman among first to receive vaccine

-FDA authorizes nation's first at-home, over-the-counter COVID-19 test

-CVS will play key role in COVID-19 vaccine rollout

-Maricopa County to begin vaccinating Thursday after receiving vaccines on Monday

-As Arizona plans to start COVID-19 vaccinations, here is what you need to know.

-Navajo Nation receives first shipment of COVID-19 vaccine

-HonorHealth receives doses at northeast Valley vaccination site

-First shipment arrives in Arizona

Noon Wednesday: Frontline workers to receive some of the first COVID-19 doses in Phoenix today

Frontline healthcare workers will receive some of the first doses of the COVID-19 vaccine in Arizona at 5 p.m. Wednesday, state and Maricopa County health officials announced.

State health director Dr. Cara Christ will be joined by a diverse group of frontline workers who will receive the vaccine at the Arizona State Public Health Laboratory, state officials said.

— Stephanie Innes

11:30 a.m. Wednesday: Maricopa County to begin vaccinations Thursday

Maricopa County will begin vaccinating health care workers at two locations in the county on Thursday morning. Three additional "point of dispensing" sites will open next week.

The county received about 18,000 Pfizer doses Monday and an additional 25,000 doses Tuesday, according to Marcy Flanagan, the county's public health director.

Eligible health care providers who see COVID-19 patients, environmental services staff who clean facilities and emergency medical services workers are getting appointments based on exposure and risk. Pre-screening began on Friday for the first appointments at the two sites, Flanagan said.