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.

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

To continue reading this article, you must login.
  • 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
Learn more about the many benefits and features of joining Harvard Health Online »