Like almost everyone, Maryam Ahmad had her life upended this spring by the onset of a pandemic that’s still raging across the nation.But she said she’s well-prepared to lead at a time when the United States is battling what she described as two pandemics: COVID-19 and racism.Ahmad, a former Cook County circuit judge and public defender who now heads the Cook County State’s Attorney’s Juvenile Justice Bureau, grew up in segregated Dayton, Ohio, in the aftermath of the civil unrest of the late 1960s.She was raised in an …