### q1 parasitic worms are common in the developing world > Here’s the prevalence of roundworm infections by country ([source](https://journals.sagepub.com/doi/full/10.1177/2058739220959915)). But alongside roundworms, there are threadworms, hookworms, blood flukes, liver flukes, nematodes, trematodes, all sorts of worms. Add them all up and somewhere between half and a quarter of people in the developing world have at least one parasitic worm in their body. - [View Highlight](https://astralcodexten.substack.com/p/ivermectin-much-more-than-you-wanted?token=eyJ1c2VyX2lkIjo4MDc2ODE1LCJwb3N0X2lkIjo0MzY2NzI3NSwiXyI6InpOWllYIiwiaWF0IjoxNjM3MTUyMTMyLCJleHAiOjE2MzcxNTU3MzIsImlzcyI6InB1Yi04OTEyMCIsInN1YiI6InBvc3QtcmVhY3Rpb24ifQ.tRZm8BzoFvip8PzDrYdk88kEhI6aZYrZu163f4GSAqc&__readwiseLocation=0%2F188%2F0%2F3%2F0%2F0%2F0%2F1%2F2%2F0%2F1%3A0%2C2%2F188%2F0%2F3%2F0%2F0%2F0%2F1%2F2%2F0%2F1%3A272#:~:text=Here%E2%80%99s%20the%20prevalence%20of%20roundworm%2Cparasitic%20worm%20in%20their%20body.) - [[Ivermectin by Scott Alexander#q1 parasitic worms are common in the developing world|View in Vault]]