"I now know more about myself." The EP's sound incorporates folktronica soundscapes, vocal harmonizations, expansive reverb, layered synthesizers and tribal percussion. Its production was characterized as contained and deliberate in comparison to the intense sound of All My Demons Greeting Me as a Friend. Aurora called Infections of a Different Kind (Step 1) a "power album", with the desire "to [make] people feel powerful, to feel like they have this extra support." Its lyrical themes as domestic abuse, global warming, connection versus connectivity, fear of intimacy and empowerment, written with personal and affecting lyrics. She commented that the meanings of the songs "depends on the way that people listen to it", wanting to leave them open to interpretation. While maintaining some of the themes and stories of her previous album, the EP marks the first time that Aurora has included themes of politics and sexuality in her music. Most of her inspiration for the record came from the interaction that she had with her fans during her first tour. The EP's title comes from the eighth track, which Aurora declared as "the most important song I've ever written". Release and promotion Aurora initially wanted to release new music in November 2016, however, she noted that it was not possible due to her touring schedule in promotion of her debut album. In September of that year, she teased a possible release date in November 2017. Aurora stated in March 2018 that the EP was expected to be released in the fourth quarter of 2018, without giving an exact date. A trailer titled "Our Queendom Come" was released on 5 April 2017, which led fans to speculate the name as the record's title. Infections of a Different Kind (Step 1) was released to digital music platforms on 28 September 2018 as a surprise release. A sequel, which was revealed to be titled A Different Kind of Human (Step 2), followed on 7 June 2019. CDs and LPs were released on 1 November 2019, a year after the record's digital release. The same day of Infections of a Different Kind (Step 1)s digital release, several magazines like Clash, The Line of Best Fit and NME interviewed Aurora about various topics, including her fame, her home, climate change, the concept behind the EP and its upcoming follow-up. She appeared on Late Night with Seth Meyers, where she performed "Queendom". The EP received further promotion