NEW YORK (AP) — Omicron has raced ahead of other variants and is now the dominant version of the coronavirus in the U.S.

Federal health officials said Monday that omicron accounted for an estimated 73% of new infections last week.

The Centers for Disease Control and Prevention numbers show nearly a six-fold increase in the proportion of infections in only one week.

Since the end of June, the delta variant has been the main version causing U.S. infections. Scientists in Africa first sounded the alarm about omicron less than a month ago.

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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Data for this list was acquired from trusted online sources and news outlets. Read on to discover what major law was passed the year you were born and learn its name, the vote count (where relevant), and its impact and significance.