What key event does Schlosser reference to illustrate changes in food safety regulations?

Schlosser references the E. coli outbreak linked to fast food chains as a pivotal event that highlighted significant flaws in food safety regulations. This outbreak underscored the health risks associated with mass-produced food and prompted public concern over safety standards in fast food production. The incident acted as a catalyst for change, leading to increased scrutiny of food processing practices and ultimately influencing the implementation of stricter health regulations to protect consumers. By highlighting this outbreak, Schlosser effectively illustrates the profound impact such events can have on food safety legislation and public policy.