How did Felicia trick Matt into going to the hospital From the house of the scorpions?

In "The House of the Scorpion" by Nancy Farmer, Felicia tricks Matt into going to the hospital by pretending that he is seriously ill. She uses her manipulative skills to convince him that it is necessary for his health, despite his reluctance. This deception stems from her desire to protect him and ultimately leads to significant developments in the story regarding Matt's identity and his relationship with the people around him.