The Viral Insurgent: Ebola in Sierra Leone: Muller_Ebola_SierraLeone_15

A government health worker keeps tally of those who pass an Ebola quarantine checkpoint in the road leading from Freetown to Kenema, Sierra Leone on Saturday August 16, 2014. The government of Sierra Leone has set up numerous checkpoints leading into and out of heavily Ebola affected areas. (Pete Muller/Prime for the Washington Post)

A government health worker keeps tally of those who pass an Ebola quarantine checkpoint in the road leading from Freetown to Kenema, Sierra Leone on Saturday August 16, 2014. The government of Sierra Leone has set up numerous checkpoints leading into and out of heavily Ebola affected areas. (Pete Muller/Prime for the Washington Post)