Fig. 4

Transmission tree of EVD cases and the timeline of two community clusters in Jui, Kossoh town, and Grafton community, Sierra Leone, from January 13 to May 19, 2015. Panel A: Transmission tree for the EVD cases in three communities of Sierra Leone, January 13-May 19, 2015. In this transmission tree diagram, EVD cases are identified by sequential numbers in each small circle based on date of onset, and labeled with the occupation (source of case detection, amount of contact persons for each case). NA-not available for occupation of C8. On the abbreviation of the source of case detection: T-contact tracing, C-community report, H-house to house visit. Each EVD cases (small circle) is followed by a period of community infectivity time (dotted line); time from date of hospitalization in ETU isolation or safe burial to onset of the next generation case (black arrow); and time from date of hospitalization in ETU or safe burial to final outcome (solid black line), D-died, R-recovered. Panel B: Timeline of exposure history, clinical and control procedure for two cluster of EVD cases in Jui community (Panel B1) and in Kossoh Town community (Panel B2). The abbreviation: E-last exposure to probable or confirmed EVD cases; O-onset of illness; R-case report; S-specimen collection; I-case investigation; H-hospitalization in ETU; C-Being identified as probable or confirmed EVD case; D-died; Re-recovery; NA-not available