GiveWell looked at this in 2009 and decided that chemoprophylaxis is not cost effective.
GiveWell leans on a 2005 Cochrane study that concluded that “For the comparisons of oral or topical antibiotic against placebo/no treatment, the data are consistent with there being no effect of antibiotics”.
However, it looks like Cochrane revisited this in 2019 and I’m not sure if Givewell took a second look.
GiveWell looked at this in 2009 and decided that chemoprophylaxis is not cost effective.
GiveWell leans on a 2005 Cochrane study that concluded that “For the comparisons of oral or topical antibiotic against placebo/no treatment, the data are consistent with there being no effect of antibiotics”.
However, it looks like Cochrane revisited this in 2019 and I’m not sure if Givewell took a second look.