A day after the World Health Organization declared Liberia free from the Ebola virus, it confirmed that a new case has emerged in Sierra Leone. That country was still under a period of enhanced surveillance following the November 7 declaration that it was free of disease transmission. What follows now is tracking of the new case and the contacts with that person to determine the lines of transmission and identify other possible infected people.
Hopefully what comes next is that the patient is successfully treated and any who came in contact either test negative or are effectively treated. Flare ups are likely to happen again in each of the affected countries, but hopefully transmission can be limited, if not eliminated.