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Ethics declarations Ethics approval and consent to participate Ethical approval to conduct the study was approved by the Northern Health and Disability Ethics Committee NZ (# 19/NTB/215)

Companies are investing in research and development to create new and improved products, such as devices with longer battery life, enhanced safety features, and better performance

The woman is seen from the chest up in the frame with smoke visibly rising around her as she exhales.

Cold air often aggravates coughing and difficulty breathing, so avoiding cold air or wearing a cold-air mask (such as a ski mask or face scarf) may help when in cold environments