4 Keys to Understanding COVID-19 Surge at Border – More than 18% of families and 20% of unaccompanied minors who illegally crossed the border tested positive for the coronavirus, according to the NBC News report on the Department of Homeland Security document. That DHS document was included in a briefing for President Joe Biden, NBC reported. The DHS document also showed that more than a quarter of illegal immigrants who were being deported tested positive, requiring U.S. Immigration and Customs Enforcement to remove them from planes. The COVID-19 among illegal immigrants is because of “the highly transmissible delta variant combined with lengthier stays in crowded [U.S. Customs and Border Protection] facilities,” the document says. Employees at a shelter run by the U.S. Department of Health and Human Services in Fort Bliss, Texas, filed whistleblower complaints alleging that supervisors told them to downplay the number of migrant children who tested positive for the virus. This is a result of the Biden administration’s lax border policies, said Lora Ries, senior research fellow for homeland security at The Heritage Foundation, the parent organization of The Daily Signal.