3 ms·
You do double blind against a placebo with an at risk group. Then in X years you look at infection rates with survey data to complement it.
by kenjackson 16y ago
You do double blind against a placebo with an at risk group. Then in X years you look at infection rates with survey data to complement it.
- mirkules 16y agoIf I understand this correctly, it's all about finding a best-fit model for the change in infection rates after X amount of years. There could be a number of factors at play (environmental, political, religious), but the "correct" cause of change will stick out like a sore thumb.