Public Health is investigating an outbreak of gastrointestinal illness associated with a private event catered by a Tacos El Guero food truck on September 14, 2023.  Symptoms and timing of illness onsets were suggestive of a bacterial toxin, such as Clostridium perfringens or Bacillus cereus.
The exact food or drink that caused the illnesses

All cans of Slim Fast have been voluntarily recalled by their manufacturer, Unilver, due to potential contamination with a bacteria called Bacillus Cereus, according to this report on  MSNBC. com.  The bacteria can cause nausea, vomiting, and diarrhea in humans.   The recall reportedly affects roughly 10 million products.   

According to MSNBC:

An unknown number of people have gotten sick