Jamestown was located near a swamp, ground that is always wet. what problem did jamestown colonists have because of this location?

The people living in the colony of Jamestown had a very big problem with the swampy surroundings because the swamp was attracting lots of mosquitoes, and the mosquitoes were transporting diseases with them. Because there were lots of mosquitoes, people were getting stung by them on a daily basis and it happened very often that they would get some disease from them, and while some diseases did not caused big problems, some were fatal.

Poor Health (APEX : ])