Ivermectin is also used to treat COVID in countries that have endemic parasite outbreaks. COVID responds well to steroids, but so do parasites. Giving steroids to someone with parasites causes the parasites to become much stronger, and trigger reactions from the immune system: fever, etc.

I ideally you could test for parasites, but time and resources don't allow for that in many countries. So if it's generally safe to just give ivermectin along with steroids when treating COVID - in countries where parasites are common.

Maybe I'm wrong about this. Maybe I'm making it up. Don't listen to what I say. Listen to your doctor.