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Neutropenia is an abnormally low concentration of neutrophils (a type of white blood cell) in the blood. [4] Neutrophils make up the majority of circulating white blood cells and serve as the primary defense against infections by destroying bacteria , bacterial fragments and immunoglobulin -bound viruses in the blood . [ 5 ]
Lymphocytopenia is commonly caused by a recent infection, such as COVID-19. [3]Lymphocytopenia, but not idiopathic CD4+ lymphocytopenia, is associated with corticosteroid use, infections with HIV and other viral, bacterial, and fungal agents, malnutrition, systemic lupus erythematosus, [4] severe stress, [5] intense or prolonged physical exercise (due to cortisol release), [6] rheumatoid ...
Life expectancy rose from 44.6 to 77.47 years from 1950 to 2020, and is expected to reach about 80 years in 2050. [14] In 2018, 249.49 million people over 60 years old constituted 17.9 percent of the total population. [15] Chinese state media reported the country's total fertility rate dropped to 1.09 in 2022. [16]