We hypothesize that ivermectin, a drug used to treat parasitic worm infections, interacts
with the human innate immune system and that this contributes to its anti-parasitic effects.
Participants will donate blood before and after being administered the normal human dose of
the drug. We will compare the cell types present in the blood and the chemicals known to
influence the human immune system before and after the drug is given, as well as measuring
any changes in gene expression in white blood cells 4 and 24hrs after the drug is taken.