Ebola is spreading in the western Democratic Republic of Congo, with about 50 known cases over an enormous area flanking the Republic of Congo and the Central African Republic, the World Health Organization (WHO) said on Monday.

Since specialists declared the episode on June 1, 48 cases have been affirmed in Congo's Equateur territory, with a further three plausible cases and an aggregate of 20 passings, WHO's top crises master Mike Ryan said.

"This is as yet an extremely dynamic flare-up, and I would state it is as yet an incredible concern," Ryan told a news preparation.

The territory incorporates some portion of the River Congo, he stated, including that it was an enormous topographical zone where networks were connected and individuals voyaged significant distances.

"I would alert everybody that while the numbers in this occasion are low, again in the period of COVID it is significant that we don't take our eyes off these other developing sicknesses and we found in North Kivu and different past episodes of Ebola that these can gain out of power effectively," he said.

Ryan was alluding to a different episode of Ebola in Ituri and North Kivu regions of eastern Congo that was announced over a month ago. That plague, the second biggest on record, saw 3,463 affirmed and likely cases and 2,277 passings for more than two years.