WASHINGTON (AP) — Vice President Kamala Harris has tested positive for COVID-19, the White House says.

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It's a sharp new reminder of the persistence of the highly contagious virus even as the U.S. eases restrictions in a bid to revert to pre-pandemic normalcy.

The White House said Tuesday that Harris tested positive on both rapid and a PCR tests, and said she “has exhibited no symptoms.”

Harris will isolate at her residence but continue to work remotely, and would only return to the White House once she tests negative for the virus.

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.