Oseltamivir is still getting used. Appears to be helpful, not less than as being a prophylactic. They also speculate the woman might have purely natural immunity from her contact with ducks before. Hemagglutinin inhibition (Hello) assay: The HI assay checks for antibodies to the hemagglutinin of the particular influenza virus https://www.dailypioneer.com/2015/page1/govt-forms-panel-to-consider-declassifying-netajis-files.html