By Matt Christopherson

(CBS Detroit) – Walmart and Sams Club stores are joining the vaccine race to fight the coronavirus.

The big-box chains will start administering COVID-19 vaccines tomorrow.

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The retailers will provide the service at more than one thousand pharmacies in 22 states beginning this week. Walmart says it will focus on locations in underserved communities.

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The companies are aiming to deliver nearly $13 million coronavirus vaccine doses every month.

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Matt Christopherson