Killer example sentences

Reduced levels of natural killer cell cytotoxicity have been found in people who are highly stressed, including students facing important examinations, bereaved persons, and those who are severely depressed.Stress can affect natural killer cell cytotoxicity, which is of major importance in the defence against various infections and cancer.People who cope poorly with stress have an impaired immune response and diminished activity of natural killer cells.Natural killer cells are involved in the figureht against both viruses and tumours.There are several kinds of white blood cells or leucocytes within the immune system, including T cells, B cells and natural killer cells.Stricter safety regulations and implementation of environmental laws are essential to prevent mining from becoming a killer industry .