The US is home to around seven million undocumented migrants from central and south America. Many have been in the US for years, providing a vital workforce for the US economy. But they have no health cover or workplace benefits, and many live under the constant threat of deportation.

As Americans prepare for another presidential race where immigration is high on the agenda, Mike Lanchin travels to the state of Maryland to hear about the lives of some of its large undocumented Latino population.

Maria is a single mother from El Salvador, who gets up at 5am for work, but has no holiday, sick pay or job security. Her younger sister, Delmi, tells Mike how she has been using false papers to get work since arriving last year and fears that she and her family will have to move constantly to avoid deportation. And we hear from Toño, who came to the US as an unaccompanied minor, but now has a temporary work permit.