After discussing about this matter a little bit, everyone came to the decision that just killing off all the worms and infected monsters would be the best course of action in this case. That was done mainly because the worms in this danger zone had permanently affected the monsters and even removing them was not enough to get rid of the corruption completely. That was the reason why it was needed to kill off all the monsters.
So without wasting any time, Rein and his team immediately got to work. The monsters of this danger zone were not too strong, so everyone had an easy time getting rid of them. The strongest monster here was slightly stronger than a regular UR grade, so Hana was able to kill it in just one attack.