Figure 2
Immunohistochemical detection of HPAI viruses in paraffin-embedded tissue sections from infected voles. Positive staining by IHC in trachea (A) (red arrow) and lungs (B) collected on day 3 pi from two voles intranasally infected with 103.75 EID50/0.1 mL of the Os/H7N1 virus.