People with severe asthma

Up to 50% of people with severe asthma have high eosinophils in their lungs
Up to 50% of people with severe asthma have high eosinophils in their lungs

A simple blood test can measure your eosinophil levels

This test is often part of routine blood work, and you may have already had one. Ask your doctor if you should have a blood test for your asthma, especially if you:

  • Use your rescue inhaler on more than 2 days a week5,6,13
  • Wake up at night due to asthma symptoms5
  • Take oral steroids for your asthma5,6,13,14
  • Have had asthma attacks that needed emergency care in the past year5,6,13

These can be signs of severe asthma that is poorly controlled.5,6,13,14