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Lung ultrasound scores determined by the number of B lines and subpleural consolidation. (A) Normal aeration with 0–2 B lines, score = 0, (B) a small loss of aeration with ≥3 B lines, score = 1, (C) a moderate loss of aeration with multiple coalescent B lines or small subpleural consolidation, score = 2, and (D) a severe loss of aeration with consolidation or large subpleural consolidation, score = 3.
