Rainbow member Jisuk has been rushed to the emergency room due to a sudden high fever. She has been practicing for their comeback also along with their tight schedule and suddenly she got a flu.

Agency's officials said, "Rainbow worked really hard for their second digital single MACH, there will be no delay from their schedule and the release will be pushed through on the 20th and their first comeback stage on the 21st".

Meanwhile, they will be releasing "MACH" by midnight of the 20th.

Source: Newsen
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