Do you need a portable air purifier?

Photo: Thinkstock
If it hasn't been used in a while, dust an air purifier before turning it on.

Published: February, 2014

The machines can help when it's hard to breathe.

To continue reading this article, you must log in.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise

New subscriptions to Harvard Health Online are temporarily unavailable. Click the button below to learn about our other subscription offers.

Learn More »