Anthony Pike, C.M.A., who works at OHSUs drive-through COVID-19 testing site at Hillsboro Stadium, receives a Pfizer BioNTech COVID-19 vaccine injection on Dec. 18, 2020. (OHSU/Josh Andersen)

Christine Greco, R.N., who works at OHSUs drive-through COVID-19 testing site at Hillsboro Stadium, receives a Pfizer BioNTech COVID-19 vaccine injection on Dec. 18, 2020. (OHSU/Josh Andersen)

Thirteen frontline workers who work at the OHSU drive-through COVID-19 testing site at Hillsboro Stadium received their first dose of the Pfizer BioNTech COVID-19 vaccine on Dec. 18, 2020. (OHSU/Josh Andersen)

Thirteen frontline workers who work at the OHSU drive-through COVID-19 testing site at Hillsboro Stadium received their first dose of the Pfizer BioNTech COVID-19 vaccine on Dec. 18, 2020. (OHSU/Josh Andersen)

Thirteen frontline workers who work at the OHSU drive-through COVID-19 testing site at Hillsboro Stadium received their first dose of the Pfizer BioNTech COVID-19 vaccine on Dec. 18, 2020. (OHSU/Josh Andersen)

Medical assistant Danielle Salinas, who works at the OHSU drive-through COVID-19 testing site at Hillsboro Stadium, receives a Pfizer BioNTech COVID-19 vaccine injection on Dec. 18, 2020. (OHSU/Josh Andersen)

Oregon Health & Science University administered its first COVID-19 vaccine injections to healthcare workers on Wednesday, Dec. 16, 2020. Shown here is the first dose, which was given to a cardiovascular critical care nurse. (OHSU/Fritz Liedtke)

Oregon Health & Science University administered its first COVID-19 vaccine on Wednesday, Dec. 16, 2020, when cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., received an injection of the Pfizer BioNTech vaccine from dental resident Ryan Thrower, D.M.D. Thrower is the first dental resident in the U.S. to give a COVID vaccine, thanks to the 2019 passage of Oregon House Bill 2220, which made Oregon the first state to enable dentists to prescribe and give any vaccine to their patients, regardless of their age. (OHSU/Fritz Liedtke)

A cardiovascular intensive care nurse was the first Oregon Health & Science University employee to receive a COVID-19 vaccine on Wednesday, Dec. 16, 2020. (OHSU/Fritz Liedtke)

Oregon Health & Science University administered its first COVID-19 vaccine on Wednesday, Dec. 16, 2020, when cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., received an injection of the Pfizer BioNTech vaccine from dental resident Ryan Thrower, D.M.D. Thrower is the first dental resident in the U.S. to give a COVID vaccine, thanks to the 2019 passage of Oregon House Bill 2220, which made Oregon the first state to enable dentists to prescribe and give any vaccine to their patients, regardless of their age. OHSU Senior Vice President and Chief Operations Officer Joe Ness, M.H.A., R.Ph., (left) applauded the historic moment. (OHSU/Fritz Liedtke)

A dose of the Pfizer BioNTech COVID-19 vaccine is prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

A dose of the Pfizer BioNTech COVID-19 vaccine is prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

Several age groups and people who are high risk of severe illness from COVID-19 in Oregon are eligible for a Pfizer-BioNTech COVID-19 vaccine booster. Shown here are vials of the Pfizer BioNTech COVID-19 vaccine. (OHSU/Fritz Liedtke)

A dose of the Pfizer BioNTech COVID-19 vaccine is prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

A dose of the Pfizer BioNTech COVID-19 vaccine is prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

A dose of the Pfizer BioNTech COVID-19 vaccine is prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

Doses of the Pfizer BioNTech COVID-19 vaccine are prepared for injection at Oregon Health & Science University on Wednesday, Dec. 16 2020, when OHSU gave the vaccine to its healthcare workers for the first time. (OHSU/Fritz Liedtke)

OHSU cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., receives his second and final shot of the Pfizer BioNTech COVID-19 vaccine from first-year OHSU nursing student Lia Gutierrez on Jan. 6, 2021. Drammeh was the first OHSU healthcare worker to receive a COVID-19 vaccine injection on Dec. 16, 2020. Students are among the many people helping administer COVID-19 vaccines at OHSU. (OHSU/Josh Andersen)

OHSU cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., receives his second and final shot of the Pfizer BioNTech COVID-19 vaccine from first-year OHSU nursing student Lia Gutierrez on Jan. 6, 2021. Drammeh was the first OHSU healthcare worker to receive a COVID-19 vaccine injection on Dec. 16, 2020. Students are among the many people helping administer COVID-19 vaccines at OHSU. (OHSU/Josh Andersen)

OHSU cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., receives his second and final shot of the Pfizer BioNTech COVID-19 vaccine from first-year OHSU nursing student Lia Gutierrez on Jan. 6, 2021. Drammeh was the first OHSU healthcare worker to receive a COVID-19 vaccine injection on Dec. 16, 2020. Students are among the many people helping administer COVID-19 vaccines at OHSU. (OHSU/Josh Andersen)

OHSU cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., receives his second and final shot of the Pfizer BioNTech COVID-19 vaccine from first-year OHSU nursing student Lia Gutierrez on Jan. 6, 2021. Drammeh was the first OHSU healthcare worker to receive a COVID-19 vaccine injection on Dec. 16, 2020. Students are among the many people helping administer COVID-19 vaccines at OHSU. (OHSU/Josh Andersen)

OHSU cardiovascular intensive care nurse Ansu Drammeh, R.N., B.S.N., receives his second and final shot of the Pfizer BioNTech COVID-19 vaccine from first-year OHSU nursing student Lia Gutierrez on Jan. 6, 2021. Drammeh was the first OHSU healthcare worker to receive a COVID-19 vaccine injection on Dec. 16, 2020. Students are among the many people helping administer COVID-19 vaccines at OHSU. (OHSU/Josh Andersen)