Why is it important to warn travelers about yellow fever?

It's important to warn travelers about yellow fever so they could be prepared, and know what to do when it happens or to just have caution.

Explanation:

Hope this helps

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

use wikipedia, i think they have this.