▁to ▁c ure ▁or ▁prevent ▁sw ine ▁flu . ▁ ▁Other ▁federal ▁ag encies ▁ ▁Department ▁of ▁Hom eland ▁Security ▁Secretary ▁Nap olit ano ▁stated ▁that ▁D HS ▁was ▁the ▁principal ▁federal ▁office ▁for ▁inc idents ▁such ▁as ▁the ▁H 1 N 1 ▁flu ▁out break , ▁and ▁" Under ▁that ▁role , ▁we ▁have ▁been ▁leading ▁a ▁true ▁collabor ative ▁effort ." ▁The ▁Department ▁of ▁Hom eland ▁Security ▁has ▁a ▁document , ▁dated ▁November ▁ 1 , ▁ 2 0 0 5 , ▁entitled ▁" National ▁Str ategy ▁for ▁Pan demic ▁In fl uen za ", ▁detail ing ▁planning ▁for ▁potential ▁pan dem ics . ▁https :// web . archive . org / web / 2 0 0 9 0 5 0 7 0 1 3 2 1 3 / http :// www . pan demic flu . gov / plan / f eder al / pan demic - infl uen za . pdf ▁ ▁State ▁Department ▁The ▁State ▁Department ▁suggested ▁travel ers ▁to ▁Mexico ▁stay ▁alert ▁and ▁comp ly ▁with ▁guidance ▁from ▁Mexican ▁public ▁health ▁officials , ▁but ▁did ▁not ▁imp ose ▁any ▁travel ▁restrictions ▁on ▁US ▁citizens ▁to ▁Mexico . ▁However , ▁the ▁State ▁Department ▁did ▁recommend ▁US ▁citizens ▁avoid ▁non - ess ential ▁travel ▁to ▁Mexico . ▁ ▁Department ▁of ▁Agricult ure ▁The ▁Department ▁of ▁Agricult ure ▁( US DA ) ▁reported ▁no ▁sw ine ▁in ▁the ▁US ▁have ▁been ▁inf ected ▁so ▁far , ▁but ▁the ▁US DA ▁is ▁monitoring ▁sw ine ▁across ▁the ▁US ▁for ▁signs ▁of