Where it comes from is the Biden administration is letting in asylum seekers. Everyone coming in is asking for asylum because it gets them money and to be released into the U.S. pending an asylum hearing(which most never show for). Under the current rules asylum seekers don't have to submit to a test for covid by the Federal government. However the city of Brownsville, TX recently did tests on newly released asylum seekers and found over 100 with covid in a small sampling. And that's just one small part of the border. We just saw a SUV packed with 25 illegals get hit by a truck in Southern California. 13 were killed, most of the rest hospitalized. Hundreds of children sent to the border are now being held(where's the outrage?).