A 4-year-old child in Pakistan presents with fever, muscle weakness, and difficulty breathing. The parents report that the child had a minor fever and vomiting a few days ago, but now struggles to move their legs. Based on the disease progression, what is the most critical next step in diagnosis?
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This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.