Respiratory Infections and Immunity

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Across
  1. 4. A pathogen that is normally a commensal, but can cause disease when the host’s resistance is low.
Down
  1. 1. Specialized tissue specific monocyte involved in phagocytosis.
  2. 2. A white blood cell which engulfs extracellular pathogens.
  3. 3. An inflammatory condition of the lung affecting predominantly the alveoli and usually caused by a pathogen.