CHANGE: U.S. tightens Ebola monitoring for West African visitors. “The move announced by the U.S. Centers for Disease Control and Prevention (CDC) marked the latest precautions put in place by the U.S. government to stop the spread of the virus, but stopped short of a ban on travelers from Liberia, Sierra Leone and Guinea as demanded by some lawmakers. The CDC said that, beginning on Monday, travelers from those countries will be directed to check in with health officials every day and report their temperatures and any Ebola symptoms for 21 days, the period of incubation for the virus.”