WASHINGTON (AP) — Months of campaigning have come to a close as Americans are casting their votes in the midterm elections that will decide control of Congress and top governorships.

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Tuesday's vote could also help shape economic policy, access to abortion and even how elections are held.

They are certain to test the political strength of President Joe Biden and his predecessor, Donald Trump.

No major early voting problems have been reported, though there are some hiccups typical of most Election Days.

In Philadelphia, where Democrats are counting on strong turnout, people complained about being turned away as they showed up in person to try and fix problems with their previously cast mail-in ballots.

KEEP READING: Scroll to see what the big headlines were the year you were born

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.

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