Quazulu VIII

From Memory Alpha, the free Star Trek reference

Quazulu VIII was a planet in the Quazulu system. One of the major landforms of this planet was the Denubian Alps.

In 2364, several students from the USS Enterprise-D became infected with a dangerous virus in a holodeck simulation of Quazulu VIII. The students subsequently introduced the virus to the Enterprise, disabling almost the entire crew. (TNG: "Angel One")