I think they have known all along about the yeast problem, because antifungal drugs have always been sky high . And they carry with them a very high incidence of liver toxicity, which may or may not be due to the drug itself. Its possible it could be partly due to the amount of toxins released in the die-off process when the antifungals kill the yeast (candida) cells. Whichever the case, I beleive they know about fungal problems but are keeping it quiet because of the wide range of health problems they cause. After all, if it were to get out that the cause of a lot of major diseases and ill-health conditions are a fungus, it would put the entire health care industry in jeopardy.