Oseltamivir is still being used. Appears efficient, no less than to be a prophylactic. Additionally they speculate the lady might have natural immunity from her contact with ducks previously. For a new edition of fowl flu spread via North America this spring, experts started locating the virus in red foxes, https://www.dailypioneer.com/2021/trending-news/larry-king--broadcasting-giant-for-half-century--dies-at-87.html