On 23rd November, Wheesung was diagnosed with swine flu. He was given Tamiflu and is said to be recovering well. His company POP/UP Entertainment stated:

After receiving the Tamiflu treatment, his fever went down almost immediately and he’s almost at a state of full recovery. Today we plan to revisit the hospital and check up on his status.”

This means he wont be attending “Fill Korea, K-POP Night” in Shanghai, China on 25th November. Not to worry fans, he’ll be back on Music Bank 26^th November.