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Lung virus titers of mice infected with the H6 avian influenza viruses. Each group of mice was intranasally inoculated with each virus and sacrificed at 3 or 5 days postinfection, and lungs were removed. Data are presented as log10 50% egg infectious doses per milliliter (log10 EID50/ml). Abbreviations: CN20, A/AB/Kor/CN20/10 (H6N1); CN17, A/AB/Kor/CN17/09 (H6N2); CN5, A/AB/Kor/CN5/09 (H6N5); W69, A/AB/Kor/W69/05 (H6N5); CN9, A/AB/CN9/09 (H6N8).
