Jeju's COVID19 Status Gets Worse

Jeju is now facing worsening COVID19 situation as it has new patients coming up for 3 consecutive days, and many travelers to Jeju test positive after they arrived in Jeju and even after they go back.
The 70th case came from a close contactor to the 69th patient.

The 71st case is of a person who came to Jeju on November 22. S/he got a notice call of having been in a quarantine boundary with a Busan case.

And it is revealed that community leaders from Jinju, Gyeongsangnam-do visited Jeju from November 16 through 18 before tested positive today. One of them made another trip from November 20 through 22.
Can Jeju make a successful coronavirus countermeasures?