J&J's coronavirus shot could dramatically accelerate the US vaccine rollout. Here's your new vaccination timeline.

A clinical trial volunteer participates in Johnson & Johnson's study to test a coronavirus vaccine.
Janssen
Johnson & Johnson's single-dose coronavirus shot was just authorized for emergency use.
With fresh vaccine doses from J&J, the US could finish vaccinating priority groups in March.
The US could distribute 500 million doses by the end of June — enough to vaccinate all of its adult population.
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A shot for every America