There aren't any immediate flights involving the US and Kinshasa, according to flight checking Web-sites, Whilst travellers can however arrive by way of connecting flights. Hemagglutinin inhibition (HI) assay: The HI assay checks for antibodies for the hemagglutinin of the precise influenza virus making use of purple blood cells (RBC). https://www.dailypioneer.com/2021/state-editions/nhai---s-step-motherly-attitude-to-state-questioned.html