A 4-year-old girl presents with a 2-day history of muscle we…

Questions

A 4-yeаr-оld girl presents with а 2-dаy histоry оf muscle weakness. Her parents state she has stopped walking, and she tells them her legs feel "loose." Two weeks ago, she had mild flu-like symptoms, including fever, sore throat, headache, and fatigue. Her family is seeking asylum from West Africa. Her vitals are blood pressure 110/78 mm Hg, heart rate 64 bpm, respiratory rate 15 breaths/min, and temperature 98 °F (36.7 °C). The physical examination demonstrates asymmetric proximal muscle weakness in the lower extremities and the absence of reflexes. Polymerase chain reaction confirms the suspected diagnosis. A vaccine would have prevented this child's condition. Which of the following is a component of this vaccine?