After completing their second album , the group embarked on their Queen II Tour as a support act for Mott the Hoople . They toured extensively throughout the UK , at which point the two groups decided to tour through the US , in what was Queen 's first US tour . The two bands would remain on friendly terms for the rest of their career , with Ian Hunter performing " All the Young Dudes " at the Freddie Mercury Tribute Concert . They played their first US show on 4 April in Denver , Colorado , as a support which Freddie Mercury reportedly disliked , saying " Being support is one of the most traumatic experiences of my life " . However , at the climax of the tour in Boston , Brian May was discovered to have hepatitis , possibly from the use of a contaminated needle during vaccinations the group received before travelling to Australia . The remainder of the tour was subsequently cancelled and Queen flew back home , where May was hospitalised . The group began writing new material until May was rushed back to hospital with an undiagnosed stomach ulcer . This left the remaining members with two weeks to write their next album , the majority of which was done in the studio
Queen II Tour
Queen II Tour
Sheer Heart Attack