Neutrophils are the most common type of white blood cell, comprising about 50-70% of all white blood cells. They are phagocytic, meaning that they can ingest other cells, though they do not survive the act. Neutrophils are the first immune cells to arrive at a site of infection, through a process known as chemotaxis.
One of the basic theories stipulates that increasing interest rates raise consumers' and manufacturers' costs, which, in turn, reduces the amount of time and money people spend driving. Less people on the road translates to less demand for oil, which can cause oil prices to drop.
Oil is used as an input in so many production processes, and we use fuel to transport ourselves and various goods. So, when the price of oil goes up, it results in increases in production costs, and this tends to lead to price increases in a number of other goods and services â i.e. it leads to inflation.