Patient isolation in the DR Congo Bundibugyo outbreak fell to roughly 39%, with 753 of 1,926 confirmed patients hospitalised in isolation as of 13 July, on the European Centre for Disease Prevention and Control (ECDC) tracker1. The World Health Organization (WHO) had put the rate at 44% on 3 July, in its Disease Outbreak News bulletin DON612. Between those two dates the figure fell rather than rose.
The US Centers for Disease Control and Prevention (CDC) modelled the outbreak in June at a reproduction number of 2.51, the average number of people each case infects, and named a single fork: at 70% patient isolation the epidemic collapses, and below it the worst-case runs reach 20,000 cases. The rate at which patients reach isolation decides the trajectory, because every unisolated patient can seed the next chain of infection while a hospitalised one cannot.
Every input money can buy has moved forward this month: vaccine financing, the first treatment-trial doses, and the first Bundibugyo diagnostic cleared onto WHO's Emergency Use Listing, its fast-track route for unlicensed products in an emergency. The one logistics variable the model said would decide the outcome has gone backwards instead.
A falling isolation percentage partly tracks faster case-finding, a swelling denominator, rather than any pure loss of ward capacity. The workforce strain running alongside it, the responder infections and the unpaid front-line staff, argues that the deterioration is real rather than a statistical artefact.
