2006 World Championships in Calgary, Alberta. He was once again troubled by illness, having been administered three different antibiotics to fight a bacterial infection, which at one point, caused him to cough up blood. He rose from seventh place in the short to finish third on the strength of his free-skating program. After the World Championships, Lysacek toured with Champions on Ice as a full member of the cast. 2006–2007 season In the 2006–2007 season, Lysacek placed second at the 2006 Skate America. Two weeks later, Lysacek won the gold medal at the 2006 Cup of China by a 20-point margin. He was the fourth qualifier for the 2006–2007 Grand Prix Final in his second consecutive year in qualifying for the event. However, he withdrew from the competition before he was to skate his short program due to an injury to his hip. Lysacek resumed training a few weeks later. At the 2007 U.S. Championships, he performed his first clean short program of the season, then went on to land his first clean quadruple jump in competition, a quadruple toe loop-triple toe loop jump, in the long program, to win his first national title. A week later, Lysacek competed in the 2007 Four Continents. He was fourth after the short program, but made yet another comeback in the free skate, landing a clean quadruple combination, to earn a new personal best and to win his second Four Continents title. At the 2007 World Championships, Lysacek made his first attempt at landing a quadruple jump in the short program. He attempted a quad-triple, but stepped out of the quad and put his hand down, and followed it with a double. He placed fifth in the short program and earned himself his first new short program personal best in two years. In the long program, he completed a quadruple toe-loop as the first part of a quad-triple combination, but lost control of the landing, adding a three turn after it, and was unable to complete the following triple as intended. He performed a double loop instead of a planned triple loop and placed fifth once again in the long program, placing fifth over all. Lysacek toured over the summer of 2007 with Champions on Ice for the second consecutive year. 2007–2008 season Lysacek began the 2007–2008 season at the 2007 Skate America. He underrotated and fell on an attempted quadruple toe loop-triple