June was a tough month for a number of entertainers who had to postpone their activities due to injuries and illness.Comedian and presenter Park Mi-sun sustained injuries to both her ankles while filming MBC's "Blind Test 180" on June 26, reports The Korea Herald. The accident occurred as she was trying a "flying chair," in which participants are thrown into the air before landing in a swimming pool. It was revealed that Park might need surgery and it would take up to three months for her ankles to heal.Meanwhile, actor and comedian Jeong Jun-ha and comedian Jeong Hyeong-don, who appear in MBC's "Infinite Challenge," have been hospitalized with a neck condition and a hernia, respectively.Jeong Jun-ha had surgery on Friday after he injured his neck while performing in musical "Spamalot."He was hit by a mask that flew at him and injured his neck, which resulted in a herniated disk."I've been in hospital for 10 days since June 23. The herniated disk was more serious than I thought so I had to undergo surgery last Friday," said Jeong on his Twitter Tuesday morning. Jeong said he would resume recording the show on Wednesday and also plans to return to the musical, which is scheduled to run through Sept. 1.Jeong Hyeong-don had a hernia operation on June 19 and was released from, hospital Friday. He was back on his show Monday. The comedian had been seen on previous episodes of "Infinite Challenge" suffering from pain, sometimes needing to lie down.