Migrant families coming across the border into Texas amid a new illegal immigration wave are testing positive for COVID-19 at a much higher rate — up to 10 times higher in some quarters — than the positive test rate among the U.S. population. The Washington Times reports that its survey of jurisdictions that are doing the testing has found that Brownsville, Texas, has reported a 12% positive rate for the novel coronavirus among incoming migrant families. And a homeless shelter in Harlingen has seen a 25% positive rate among the migrants it has helped. The current positivity test rate for...