Doesn’t ring right really
Calmette and Guérin could have never imagined that their research would inspire scientists investigating an entirely different kind of disease more than a century later. Yet that is exactly what is happening, with a string of intriguing studies suggesting that BCG can protect people from developing Alzheimer’s disease.
If this is true then those who have had the BCG should be protected against Alz. Yet all those in the care homes are of an age where they would have had the BCG in childhood…..
What’s the bit I’m missing here? Attenuation (right word?) of the effect over time?