Translation of durchsieben

I found the idea of having two health care systems disgusting. We entered the rooms of the local hospital and the images there were horrifying. I don't know why he took me there until this day.
The ride took us through mountainous areas, covered with dark green forest, with so many curves that I got sick. I wanted to vomit but I held myself back, as there were so many other next to me.
The days before I left to Mexico and Cuba I started to track the hurricanes in the region. September was not the ideal time to visit the region, but it fitted the best according to my previous boss.