CHICAGO (AP) — Talks between Chicago school leaders and the teachers' union have resumed amid a standoff over remote learning and other COVID-19 safety measures.

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The situation looms over the start of a second week of school after three days of canceled classes in the nation’s third-largest district.

Chicago schools face the same pandemic issues as others nationwide, with a growing number of districts reverting to remote learning as infections explode during the omicron-fueled surge and sideline staff members.

But the situation in union-friendly Chicago has been amplified in a labor dispute that’s familiar to families in the mostly low-income Black and Latino district who’ve seen several similar disruptions in the last few years.

Answers to 25 common COVID-19 vaccine questions

Vaccinations for COVID-19 began being administered in the U.S. on Dec. 14, 2020. The quick rollout came a little more than a year after the virus was first identified in November 2019. The impressive speed with which vaccines were developed has also left a lot of people with a lot of questions. The questions range from the practical—how will I get vaccinated?—to the scientific—how do these vaccines even work?

Keep reading to discover answers to 25 common COVID-19 vaccine questions.