While studying at the ICMP, Árni Hjörvar Arnason was a very busy bassist taking advantage of every opportunity that came his way, playing with Judy and Bailey Tzuke on tour, Sony/RCA signed band, The New Devices and JJ Pistolet. From his presence in the vibrant live music scene of Camden and Shoreditch, Arni built his name as a fantastic bassist and together with JJ Pistolet has put together the successful band The Vaccines.
The Vaccines formed in 2010 and have since been a huge success in the UK. BBCs Zane Lowe named "If You Wanna" as his 'Hottest Record in the World' in August. On 29 November 2010, the band released their debut single "Wreckin' Bar (Ra Ra Ra)" / "Blow It Up", in the UK. The band performed live on Later with Jools Holland, the first band ever to do so before releasing a single.
In 2015, the band released their third studio album, "English Graffitti", with Zane Lowe again picking the first two singles, "Handsome" and "Dream Lover", as his Hottest Records.
In January 2011, they were placed third in the BBC's Sound of 2011 poll and, in the same week, appeared on the cover of NME Magazine for the first time. The band then spent the beginning of the year touring on the 2011 NME Awards Tour, supporting Crystal Castles. Having been signed to Columbia Records, the band released their second single "Post Break-Up Sex" on 24 January 2011, where it debuted at number 32 in the UK. It was at this time the band were nominated for an MTV Award for "Best New Band of 2011" and a Critics' Choice Brit Award. Following a trip to SXSW, the band then released their debut album What Did You Expect from the Vaccines? on 14 March 2011 through Columbia Records, to generally positive reviews.
On the 3rd September 2012 The Vaccines released their second LP. 'The Vaccines Come Of Age' reached Number 1 in the UK Albums Chart. In July 2013 they supported the Rolling Stones in Hyde Park shortly after playing the notorious Pyramid Stage at Glastonbury Festival.