Feverfew is a well known plant by North American herbalists. It does not do what you think it does and has no relationship to quinine.
You are an out and out liar who does not know what they are talking about.
A chemical analysis of this plant shows NO COMPOUNDS with Quinoline groups at all.
You are basing your entire claim on a name given in the late 19th century when it was used as a remedy for fever, just like willow bark or aspirin. But nobody claims aspirin will cure either malaria or COVID19 because it WILL NOT!!!
You are an IDIOT.
Besides, since there is so little use for this plant other than adulterating Echinacea, it is very hard to find seeds.
People should base their claims on science, even when it comes to D-I-Y and growing your own herbs. Peasants were the first true scientists.