https://www.selleckchem.com/products/dcz0415.html Coronavirus disease-2019 (COVID-19) is a rapidly evolving health crisis caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). COVID-19 is a novel disease entity and we are in a learning phase with regards to the pathogenesis, disease manifestations, and therapeutics. In addition to the primary lung injury, many patients especially the ones with moderate to severe COVID-19 display evidence of endothelial damage, complement activation, which leads to a pro-coagulable state. While there are still missing links in our understanding, the interplay of endothelium, complement system activation, and immune response to the SARS-CoV-2 virus is a surprisingly major factor in COVID-19 pathogenesis. One could envision COVID-19 becoming a novel hematological syndrome. This review is to discuss the available literature with regards to the involvement of the complement system, and coagulation cascade and their interaction with endothelium.This paper presents results from a study exploring representations of "happiness" and "unhappiness." Word associations with these concepts were produced by 16-18 and 29-34-year-old women from Finland, the country that the United Nation's World Happiness Report has ranked the "happiest" in the world. Correspondence Analysis (CA) and Hierarchical Cluster Analysis show that participants in both age groups share three clusters of words associated with "happiness" Tangible happiness, Affective happiness and Serene happiness. We noted more differences in the associations with "unhappiness," for which the two groups share only two clusters Loss and Everyday problems. A distinct third cluster, Affective unhappiness, emerged for the younger women, whereas older women's associations are further differentiated into a more complex structure, including two more clusters Dejection and Apprehension. Additionally, CA shows that in both age groups, self-reported happiness levels do not discrim