Coronavirus disease 2019 (COVID-19) has been considered as a global pandemic since its first emergence in Wuhan, China. On March 12, 2020, the World Health Organization declared the COVID-19 outbreak a pandemic. There is no established system for the classification regarding COVID-19 related<unk> . Four hypothetical mechanisms regarding<unk>  in covid19 infection are direct infection of lymphocyte, direct destroying of lymphocytic organs, inflammatory cytokines such as TNFɑ, IL-6, lymphocyte inhibition.
COVID-19-associated lymphopenia
COVID-19-associated cytokine storm
COVID-19-associated neutrophilia
COVID-19-associated Miller-Fischer syndrome
COVID-19-associated acute kidney injury
COVID-19-associated nausea and vomiting
COVID-19-associated abdominal pain
COVID-19-associated heart failure