The five wellness treatment personnel were being definitively seronegative towards H5 in all assays, meaning they weren't contaminated with H5. Hemagglutinin inhibition (Hello) assay: The Hello assay checks for antibodies to the hemagglutinin of the precise influenza virus applying pink blood cells (RBC). Multiple kinds of RBCs were being assessed https://www.dailypioneer.com/2018/state-editions/people-might-get-some-relief-for-some-days-met-deptt.html