"Since March, the Trump administration has pushed thousands of migrant children back to their home countries without legal screenings or protection, citing the risk that they could be carrying COVID-19 into the United States," says this article from ProPublica. "But by the time the children are boarded on planes home, they’ve already been tested for the virus — and proven not to have it."
According to the article, children who have tested negative for COVID-19 are being denied the usual protections, including the chance to seek asylum. "To apply the expulsion order to children, however, the administration has developed an ad hoc system in which children are held for days in hotels, with little contact with the outside world — making it almost impossible for lawyers or advocates to locate them — before being returned to the countries from which they fled."