Vail Health Hospital pharmacy technician Rob Brown, left, signs the necessary paperwork to take possession of mock Covid-19 vaccines from courier driver Leo Gomez, center, as pharmacist Jessica Peterson watches over the process in the pharmacy on Dec. 8 in Vail, Colorado.
Credit:	Helen H. Richardson/MediaNews Group/The Denver Post/Getty Images

Vail Health Hospital pharmacy technician Rob Brown, left, signs the necessary paperwork to take possession of mock Covid-19 vaccines from courier driver Leo Gomez, center, as pharmacist Jessica Peterson watches over the process in the pharmacy on Dec. 8 in Vail, Colorado.
Credit: Helen H. Richardson/MediaNews Group/The Denver Post/Getty Images

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States face tough questions about who should get Covid-19 vaccines after the initial groups

With the first shipments of a coronavirus vaccine poised to go out as early as this week, the plan to get the shots from the manufacturers into hospitals, assisted living homes, pharmacies and -- ultimately -- Americans' arms, is still riddled with unknowns.