Genome data suggests Ebola began in DR Congo in February
The Democratic Republic of Congo announced a Bundibugyo Ebola outbreak on May 15, but WHO, Africa CDC and CDC analyses indicate infections began much earlier, possibly as early as February 2026. A retrospectively identified health worker developed symptoms in late April and 80% of reported cases are in Ituri province, while genome sequencing and a CDC reconstruction argue a mid‑ to late‑February spillover is plausible. Reports from residents and the Red Cross flagged unusual deaths since late March, and Africa CDC criticised a three‑week delay between first symptoms and laboratory confirmation, a lapse that likely facilitated wider spread.
Ebola transmission in Congo likely began months before official confirmation.
Context
Officials reported an unknown high‑mortality illness in early May. Laboratory confirmation came on May 15 and genome work later suggested a February start. Further sequencing and better case access could clarify timing and improve…
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