The COVID-19 pandemic seemed like a never-ending parade of SARS-CoV-2 variants, each equipped with new ways to evade the immune system, leaving the world bracing for what would come next.
Pre-COPD Current and Former Smokers Not in the Clear for Airway Disease
Whether they had respiratory symptoms or not, former and current smokers who didn’t meet criteria for chronic obstructive pulmonary disease (COPD) had similar declines in