Walgreens healthcare professional Luis S. Solano prepares a dose of the Pfizer-BioNTec vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Walgreens healthcare professional Luis S. Solano prepares a dose of the Pfizer-BioNTec vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Walgreens healthcare professional Luis S. Solano prepares a dose of the Pfizer-BioNTec vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Walgreens healthcare professional Luis S. Solano prepares a dose of the Pfizer-BioNTec vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Walgreens healthcare professionals pass to each other the Pfizer-BioNTec vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Valerie Al-Barakat (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Elizabeth Harris-Penick (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Lillie McCray (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Lillie McCray (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Walgreens healthcare professional Luis S. Solano holds a vial of the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Margie Collins (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Austin Clark (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Lorine Jefferson (L) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (R) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Cordell Reid (L) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (R) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Bruce A. McGehee (L) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (R) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Michael Nash (R) receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Lashon Parker receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

A man receives the Pfizer-BioNTech vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

Austin Clark (R) receives the Pfizer vaccine against coronavirus disease (COVID-19) from Walgreens healthcare professional Ghassan Ayyad (L) at the Victor Walchirk Apartments in Evanston, Illinois, U.S. February 22, 2021. REUTERS/Kamil Krzaczynski

The Moderna coronavirus disease (COVID-19) vaccine is seen at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka prepares a coronavirus disease (COVID-19) vaccine at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka prepares a coronavirus disease (COVID-19) vaccine at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka prepares a coronavirus disease (COVID-19) vaccine at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka prepares a coronavirus disease (COVID-19) vaccine at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka (right) inoculates pre-school teacher Morgan DiFonzo, 25, against the coronavirus disease (COVID-19) at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka (right) inoculates pre-school teacher Morgan DiFonzo, 25, against the coronavirus disease (COVID-19) at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar TPX IMAGES OF THE DAY

People work behind a pharmacy counter at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka (right) inoculates pre-school teacher Morgan DiFonzo, 25, against the coronavirus disease (COVID-19) at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka works behind the pharmacy counter at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

A Walgreens store is seen in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka works behind the pharmacy counter at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Pharmacy manager Jayme Strnatka works behind the pharmacy counter at a Walgreens store in Chicago, Illinois, U.S. February 11, 2021. REUTERS/Eileen T. Meslar

Walgreens pharmacists prepare to administer shots of the coronavirus disease (COVID-19) vaccine to residents at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

Walgreens pharmacists prepare shots of the coronavirus disease (COVID-19) vaccine at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

A Walgreens pharmacist wears gloves before administering a shot of the coronavirus disease (COVID-19) vaccine at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

Walgreens pharmacists prepare for shots of the coronavirus disease (COVID-19) vaccine to be given to residents at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

Walgreens pharmacists prepare to give shots of the coronavirus disease (COVID-19) vaccine to residents at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

A Walgreens Pharmacist prepares for the administering of coronavirus disease (COVID-19) vaccine shots at King David Center for Nursing and Rehabilitation, a nursing home facility, in Brooklyn's Bath Beach neighborhood in New York City, U.S. January 6, 2021. REUTERS/Yuki Iwamura

A resident at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacists in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A resident at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacists in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

Walgreens Pharmacists prepare to administer the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A Walgreens Pharmacist and staff members administer the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

Walgreens Pharmacist Jonathan Zevon and a staff member prepare the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A resident at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacists in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

Walgreens Pharmacists prepare the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A staff member at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacist Craig Brandt in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A Walgreens Pharmacist prepares the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura TPX IMAGES OF THE DAY

A staff member at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacist Craig Brandt in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

Walgreens Pharmacists prepare the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Hamilton Park Nursing and Rehabilitation, a nursing home facility, in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A staff member at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacist Craig Brandt in Brooklyn, New York, U.S., January 4, 2021. REUTERS/Yuki Iwamura

A resident at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the coronavirus disease (COVID-19) vaccine from Walgreens Pharmacists in Brooklyn, New York, U.S., January 4, 2020. REUTERS/Yuki Iwamura TPX IMAGES OF THE DAY

Pasquale ?Patt? Sofia, a staff member at Hamilton Park Nursing and Rehabilitation, a nursing home facility, receives the Pfizer-BioNTech coronavirus disease (COVID-19) vaccine from Walgreens Pharmacist Craig Brandt in Brooklyn, New York, U.S., January 4, 2020. REUTERS/Yuki Iwamura

A Walgreens Pharmacist prepares a Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Crown Heights Center for Nursing and Rehabilitation, a nursing home facility in Brooklyn, New York, U.S., December 22, 2020. REUTERS/Yuki Iwamura

A Walgreens Pharmacist prepares a Pfizer-BioNTech coronavirus disease (COVID-19) vaccine at Crown Heights Center for Nursing and Rehabilitation, a nursing home facility in Brooklyn, New York, U.S., December 22, 2020. REUTERS/Yuki Iwamura

Walgreens Pharmacists prepare Pfizer-BioNTech coronavirus disease (COVID-19) vaccines at Crown Heights Center for Nursing and Rehabilitation, a nursing home facility in Brooklyn, New York, U.S., December 22, 2020. REUTERS/Yuki Iwamura