There were also other confirmed instances of laryngitis.From what I know, these are all the instances of Michael addressing his laryngitis:
According to this "Untouchable: The Strange Life and Tragic Death of Michael Jackson", he had ended the Destiny Tour with laryngitis.
Untouchable
Drawing on never-before-seen material, this definitive biography exposes the true extent of the Jackson family's dysfunctionality -- evidence of which is still in the public eye as they dispute the star's will Jackson was the most talented, richest, and most famous pop star on the planet. But...books.google.com.au
Cancelling St. Louis concert near the very start of the 88 leg of the bad tour because of Laryngitis only to reinstate it and perform anyway.
Laryngitis Forces Singer to Skip Performance
ST. LOUIS (AP) _ Pop singer Michael Jackson canceled a performance at the 18,000-seat Arena, the second time in 72 hours illness forced him to skip a scheduled concert on his 13-city tour. ''It's been a tough past three days. Michael Jackson is not known as 'no- show,''' Arena manager...apnews.com
Complaining of laryngitis during a press conference in Bangkok while he was doing the HIStory Tour.
States he has laryngitis as to explain why he can't perform at Heal The Kids charity event.
When asked to sing during an interview, he states he can't and cites laryngitis as the reason for it.
Complained of laryngitis while rehearsing for This Is It on the final day of rehearsal (and his life).
Michael Jackson's last rehearsal: 'just beaming with gladness'
Michael Jackson's last rehearsal: 'just beaming with gladness'www.latimes.com
For example, right before his BAD concert in Rome (on May 23rd, 1988) but the singer not wanting to disappoint his Italian fans he decided to perform at that night despite his health problem.
Also, the reason for postponing certain BAD concerts in Los Angeles (in November, 1988) was again due to his laryngitis.
Michael Jackson had also to postpone certain BAD concerts in Japan due to coming down with laryngitis (as revealed by his then-bodyguard in Japan).