ABSTRACT: Outbreaks of hepatitis-hydropericardium syndrome (HHS) caused by fowl adenovirus serotype 4 (FAdV-4) have resulted in huge economic losses to the poultry industry in China since 2015. However. commercially available vaccines against the FAdV-4 infection remain scarce. In our study. https://parisnaturalfoodes.shop/product-category/energin-unflavoured/