This is a developing story. For the latest local updates head to LAist.com and sign up for breaking news alerts. Interest in air filters and purifiers is spiking in Southern California, including ...
The Cool Down on MSN
HEPA air purifiers can curb dust and allergies, owners say, and a box-fan filter may help, too
Posters also cautioned against ionizer-style products marketed with extra gimmicks.
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