IELTS (International English Language Testing System) is an English language exam that is required to be taken by international candidates considering studying or working in English speaking countries like Ireland, the UK, Australia, New Zealand, Canada and USA.
OET (Occupational English Test) is also an international English language test that assesses the language proficiency of healthcare professionals who seek to register and practise in an English speaking country.
Both are chosen by regulatory bodies to ensure doctors, nurses, pharmacists and other healthcare professions have sufficient language skills to communicate at a high level. Each test consists of four sub-tests that access the skills of reading, listening, writing, and speaking.
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Health regulatory bodies generally require an advanced level of English (C1 level or higher) for healthcare professionals registration like pharmacists, nurses, doctors, etc. Most of them require a score of 7.0 or higher on IELTS or a B on OET.
Although both tests access the level of English they are quite different so the preparation courses for the two tests follow very different pathways and use very different materials.
Learn more about the IELTS here.
Learn more about the OET here.