Ivermectin kills screwworm. We've been using ivermectin regularly for years on Texas cattle. And there are other ways to deal with screwworm as the article states. Let the farmers and the appropriate agencies deal with it.
Should you get screwworm see a doctor. If you can't afford a doctor or are an illegal alien and have screwworm then go to a local Texas rancho and help apply ivermectin to their cattle. They will appreciate the help and you'll get enough slathered on you to last a year.
You have two types of screwworms, the common, and the south American. Are you sure ivermectin is as efficient against the species they're talking about?
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(Which is why it worked in that region of the country against covid
Human hosts already had the worms too
and it still killed the worms, allowing their own immune system to function correctly again)
How will you treat the wild animal population?
Or are you assuming that just treating livestock will solve the problem?