The First female to guide a Central American country, she served during the nineties once the nation were shaken by political strife. Hemagglutinin inhibition (HI) assay: The HI assay assessments for antibodies to the hemagglutinin of the particular influenza virus working with red blood cells (RBC). Multiple types of RBCs https://www.dailypioneer.com/2013/state-editions/many-blood-banks-without-licence.html