The 5 health and fitness care staff were being definitively seronegative against H5 in all assays, meaning they weren't infected with H5. * Avian influenza H5N1, excreted in large quantities in the droppings of contaminated birds, is endemic. Sporadic human instances acquired by direct contact with poultry are reported in https://www.dailypioneer.com/2017/columnists/take-a-bow-bollywood.html