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15 HIV Advocates to Watch in 2015 | They come from different cultures and regions of the world, but these fifteen HIV activists all share one important trait: a fierce devotion to HIV issues and a commitment to leave their mark on 2015

Maintenance Reality: What Youll Actually Need to Do Heres the honest maintenance schedule based on my three years of testing: Weekly/Bi-Weekly: Vacuum or wipe the pre-filter (takes 2 minutes) Check air quality indicator if present Monthly: Wash washable pre-filters (WINIX, some Alen models) Inspect for unusual odors indicating filter saturation Every 6-12 Months: Replace main filter on most units Reset filter indicator light Every 1-5 Years: Replace HEPA/carbon filters on long-life units (Austin Air, IQAir) Pro tip: Set a phone reminder for monthly pre-filter cleaning

Condition: Excellent vintage condition, patina on leather and brass commensurate with age and use of this piece

One of the main problems with the original study lies in the sample of people it used it was exclusively male, with the estimate of mortality in particular only based on data from British male doctors

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$400,000 of that would go toward school-centric attempts to reduce vape use among young smokers