In every breath, humans take in particles that may be deposited on the respiratory tract and exhale particles that may contain pathogens. Lidia Morawska and Giorgio Buonanno explain how physics ...

They are barely thicker than a human hair—yet they could significantly improve the effectiveness of inhaled medications: carrier particles in dry powder inhalers transport the active ingredient and ...

You arrive for a difficulty-breathing emergency. The patient is alert and oriented and complaining of difficulty breathing. The patient appears to be mildly distressed and slightly anxious, but vitals ...