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However, how effective they are depends on the type of purifier you choose, the room size and set up you use it in, and how well you maintain it

Such a diagnosis would place Mr

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Avoid anything labeled ionic air cleaner or ionizing filter, as these are not as effective as HEPA air purifiers, and the ozone produced by these devices can cause breathing problems for both people and pets

METHODS Data source and study setting We conducted a retrospective cohort study using longitudinal data from the NHIS-NSC, a nationally representative cohort comprising 2.2% of the South Korean population