The outbreak total now stands at 66 cases, including 15 deaths.
Though the outbreak is largely under control, officials report sporadic cases, the latest a contact of an earlier patient.
The cave where zoonotic spread occurred from bats is in a mining region.
At a briefing today, the country's health minister said the health worker had received the vaccine a few days ago and is doing well.
Two patients who were intubated for multiple organ failure were successfully extubated, thought to be a first in Africa for Marburg.
In other developments, the country reported no new cases or deaths today for the third day in a row.
Rwanda's health ministry has reported one more case and one more death over the past 3 days.
In related developments, the WHO weighed in on the latest epi data and recent travel-related measures from other countries.
Officials said the outbreak is under control and that 346 people have been immunized so far.
The steps are part of a broader US response, which has included assistance from the CDC's office in Rwanda and support for vaccination.