The Rio Grande Valley on the border with Mexico struggles with hospitals that are full and a steep death toll

McALLEN, TexasDr. Ivan Melendez was walking quickly, his eyes fixed on his phone, on his second day back at work as the public health authority for South Texass Hidalgo County after recovering from Covid-19.
He was watching a video sent to him by his patients son, telling his mother, who was hospitalized with Covid, that he loves her.
As…