EPA says: Exposure to inhalable particles can affect both your lungs and your heart. Many studies directly link the size of particles to their potential for causing health problems. Small particles (less than 10 micrometers in diameter) can get deep into your lungs, and some may even get into your bloodstream. People with heart or lung diseases such as coronary artery disease, congestive heart failure, and asthma or chronic obstructive pulmonary disease (COPD), children and older adults may be at greater risk from PM exposure.

Scientific studies have linked PM exposure to a variety of health impacts, including:

• Eye, nose and throat irritation.
• Aggravation of coronary and respiratory disease symptoms.
• Premature death in people with heart or lung disease.

Other opinions: The smaller the fine dust particles, the deeper they can penetrate into the human body and the longer they remain there. Ultra-fine particles, in particular, are often unable to be exhaled and can prove extremely difficult for the body to combat. In the short term (over hours and days), excessive exposure to particulate matter can lead to increased blood pressure and even affect blood sugar levels. Moreover, particulate matter is considered to be a highly efficient virus accelerator. In the long term (over months and years), particulate matter can gradually harm various systems in the body, including the lungs, cardiovascular system, metabolism, and nervous system. Exposure to particulate matter can also result in the development of allergies, asthma, high blood pressure, diabetes, dementia, or lung cancer.