we have the controlled experiments, correlations in infections and annectodal evidence in individual incidence: https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e2

we have the controlled experiments, correlations in infections and annectodal evidence in individual incidence: https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e2.htm https://www.cdc.gov/mmwr/volumes/70/wr/mm7035e2.htm what experiment setup that has not been done would convince you? please descirbe it.