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Photo: Scott Olson/Getty Images

Travelers with confirmed cases of measles passed through five U.S. airports this month and exposed an unknown number of passengers to the disease, ABC News reports, citing city health officials.

Why it matters: The Centers for Disease Control and Prevention says measles, a highly contagious virus that can spread from an infected person through coughing and sneezing, can live for up to two hours in an airspace where the the person coughed or sneezed.

Affected airports and cities

Chicago: An individual with measles traveled through two terminals at O'Hare International Airport over the course of a week. The person passed through O'Hare's Terminal 1 on Dec. 17 and through Terminal 3 on Dec. 12, according to the Chicago Department of Public Health.

Richmond, Virginia: A person with measles visited Richmond International Airport on Dec. 17, according to the Virginia Department of Health.

Austin, Texas: An individual with a diagnosed case of measles visited the United Airlines gate area at Austin-Bergstrom International Airport on Dec. 17, Austin Public Health reports.

Denver and Los Angeles: Three unvaccinated children traveled to a country with an ongoing measles outbreak in early December and tested positive for measles when they returned.

What they're saying: "A small number of [measles] cases are capable of quickly producing epidemics," Dr. Mark Escott, medical director for Austin Public Health, said in a statement.

The big picture: 2019 has been the worst year for measles cases in more than two decades. The CDC has so far confirmed 1,276 cases in most U.S. states.

Go deeper:

Go deeper

Swing voters oppose Texas abortion law

Protesters at a rally at the Texas State Capitol. Photo: Jordan Vonderhaar/Getty Images

All 10 swing voters in Axios’ latest focus groups — including those who described themselves as "pro-life" — said they oppose Texas' new anti-abortion law.

Why it matters: If their responses reflect larger patterns in U.S. society, this could hurt Republicans with women and independents in next year's midterm elections. The swing voters cited overreach, invasion of privacy and concerns about frivolous lawsuits jamming up the courts.

25 mins ago - Politics & Policy

Scoop: Biden bombs with Manchin

Then-Vice President Joe Biden conducts a ceremonial swearing-in for Sen. Joe Manchin in 2010. Photo: Tom Williams/Roll Call

President Biden failed to persuade Sen. Joe Manchin (D-W.Va.) to agree to spending $3.5 trillion on the Democrats' budget reconciliation package during their Oval Office meeting on Wednesday, people familiar with the matter tell Axios.

Why it matters: Defying a president from his own party — face-to-face — is the strongest indication yet Manchin is serious about cutting specific programs and limiting the price tag of any potential bill to $1.5 trillion. His insistence could blow up the deal for progressives and others.

Biden blindsides Europe with new AUKUS alliance on China

Photo illustration: Sarah Grillo/Axios. Photo: Melina Mara/The Washington Post via Getty Images

President Biden is constructing and deepening new alliances to strengthen the U.S. position in its showdown with China, but he risks alienating longstanding allies in the process.

Why it matters: Biden heralded a new agreement to help Australia acquire nuclear submarines as part of a trilateral security pact with the U.K. and the U.S. as an "historic step" to update U.S. alliances to face new challenges. The message from French foreign minister, Jean-Yves Le Drian, was quite different.