Rwanda has now gone more than 3 weeks with no new cases.
The 42-day countdown period covers two virus incubation periods.
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.
