Fig 4. 2009 H1N1 transmission from mothers to infants results in severe lower respiratory tract pathology.

Harvested lungs from control infants and infants of inoculated nursing-mothers were processed for histopathological assessment. Tissue morphology was assessed by hematoxylin & eosin staining. Data was collected from three independent litter inoculations/infections (3 inoculated/infected mothers, 16 infants, and 3 mock inoculated/infected mothers) and results are a representative of the inoculations/infections. pmi = Post-Mother-Inoculation