"Jodi Goodwin, an immigration attorney who has been representing migrants in the Matamoros camps, said that no one has been allowed to cross the border amid the pandemic, even people who need medical attention and who have health conditions that put them at a high risk of complications from the virus. Even so, most migrants have chosen to continue to wait in Mexico. There have been a small number of people who have returned to their home countries voluntarily, but for many, going back would mean risking their lives. The vast majority of them come from Guatemala, Honduras, and El Salvador, collectively known as Central America’s “Northern Triangle,” where rampant crime, violence, and corruption has driven hundreds of thousands to flee in recent years. In those countries, migrants are commonly robbed, kidnapped for ransom, raped, tortured, and killed. “90 percent of the people we are treating as patients are people who are fleeing the exact same kinds of violence as ISIS,” said Helen Perry, the executive director of Global Response Management, a health care nonprofit administering services in the Matamoros camps. “If the option is you stay here and live in your tent until you have exhausted all hope, or you go home and get your head cut off — the reality is that they don’t want to leave.”"