Imported malaria cases in three southern border jurisdictions more than doubled in 2023 from the year prior, according to the U.S. Centers for Disease Control and Prevention (CDC).

“During January–December 2023, a total of 68 imported malaria cases were identified from reportable disease surveillance systems in Pima, Arizona (18), San Diego, California (27), and El Paso, Texas (23),” the CDC said in a May 9 report.

This is 143 percent higher than the 28 cases in 2022 when there were three in Pima, 12 in San Diego, and 13 in El Paso.

“Because malaria case counts were higher than expected, enhanced case investigations were initiated,” said the agency.

The CDC found that 15 out of 68 cases occurred among U.S. residents. Two were found in newly arrived refugees and two among travelers with unknown immigration status. The majority, 49 cases, were identified among “other newly arrived migrants,” including asylum seekers.

Imported malaria cases in 2023 increased correspondingly to the entry of asylum seekers and other “migrants” into the United States via the southern land border, the CDC said.

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