A new study published in the Journal of Leukocyte Biology has found some evidence that the statin Simvastatin may impair the ability of immune cells to kill pathogens.
Statins are medications used to lower cholesterol. This is a good thing, since cholesterol is a major risk factor for cardiovascular disease. It is believed that cholesterol plays a roll in atherosclerosis (hardening of the arteries), a disease which can ultimately lead to blocked arteries, preventing adequate blood flow to the heart and causing a heart attack.
That's the good part.
The bad part; however, is that some statins, like Simvastatin appear to have negative side effects, like an impaired immune response.