Coronavirus disease 2019 (COVID-19) first emerged in Wuhan,China in late 2019. On March 12, 2020, the World Health Organization declared the COVID-19 outbreak a pandemic. There is no established system for the classification regarding<unk> . Research suggests<unk>  could be the cause of the severe symptoms of COVID-19, including acute respiratory distress syndrome (ARDS) and can be linked to the Neutrophil Extracellular Traps (NETs). Acute respiratory distress syndrome (ARDS), pulmonary inflammation, thick mucus secretions in the airways, extensive lung damage, and blood clots are suggested to be a result of the action of neutrophils. When neutrophils detect pathogens, they can expel their DNA in a web laced with toxic enzymes (called a Neutrophil Extracellular Trap) to attack them. These NETs capture and digest the unwanted pathogen. However, in cases of ARDS, (COVID-19 manifestation) they cause damage to the lungs and other organs. People of any age with certain underlying medical conditions are at increased risk for severe illness from COVID-19. Recent studies have shown the association of a high neutrophil-to-lymphocyte ratio (NLR) to severe forms of COVID-19 disease.
COVID-19-associated neutrophilia
COVID-19-associated cytokine storm
COVID-19-associated hemodialysis
COVID-19-associated respiratory failure
COVID-19-associated Guillain-Barre syndrome
COVID-19-associated polyneuritis cranialis
COVID-19-associated multisystem inflammatory syndrome
COVID-19-associated heart failure