The approval of multiple coronavirus vaccines has given people hope, but the rollout has brought uncertainty of its own.
![A nurse prepares the Pfizer COVID-19 vaccine [File: Frederic J Brown/AFP]](/wp-content/uploads/2021/03/000_94P8NP.jpg?resize=270%2C180&quality=80)
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Massachusetts giving vaccine priority to elderly residents’ aides fuels frustrations of those still waiting for jabs.
![A woman waits in the observation area after receiving a Pfizer-BioNTech COVID-19 vaccine at a mass COVID-19 vaccination site being set up at Fenway Park in Boston [Faith Ninivaggi/Reuters]](/wp-content/uploads/2021/02/2021-01-29T222442Z_1372084585_RC2YHL91UVCE_RTRMADP_3_HEALTH-CORONAVIRUS-USA-FENWAY.jpg?resize=270%2C180&quality=80)
