MINNEAPOLIS (AP) — Some Minnesota employers are concerned about how a new federal vaccine requirement for workers will affect an already tight labor market.

New regulations by the Occupational Safety and Health Administration mandate that companies with more than 100 employees require their workers to be vaccinated against COVID-19 or be tested for the virus weekly and wear masks on the job.

Minnesota Chamber of Commerce executive Vicki Stute says the emergency temporary standards will create additional economic uncertainty for companies, as well as the economy as a whole.

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.