The roof over the 1937 addition leaked, the Kahn study determined. The roof, damaged further by the July 1997 tornado, was repaired the next year. It represents an aerosolization of organic debris. Mold and fungus can result in bronchitis and even pneumonia when debris is dispersed into the air and inhaled. The only thing you can do is to avoid the building.
Mold can release mold spores that can affect people who are sensitive.
Often bacteria and mold can coexist. There's intangibles that are why historic buildings are preserved. There's the history and what it means to people. It would be a project that would rally the city. Money isn't the only question.