由于严格的生物安全措施,PA禽流感病例正在减少. PA avian flu cases decline with strict biosecurity measures.

宾夕法尼亚州的兽医报告说,禽流感控制工作取得进展,新病例由于严格的生物安全措施而下降. Pennsylvania's state veterinarian reports progress in controlling avian influenza, with new cases declining due to strict biosecurity measures. 在中西部地区, 卫生专家敦促人们谨慎防备. In the upper Midwest, health experts urge caution as the virus spreads. 密歇根州官员还警告说, 在春季野生鸟类迁徙期间风险增加, 强调需要警保护家禽. Michigan officials also warn of increased risks during spring wild bird migration, emphasizing the need for vigilance to protect poultry.