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 Prices. What's Next for Oil Prices in 2017. Oil prices surged during the first half of 2016. In February, the price of the U.S. benchmark West Texas Intermediate (WTI) hit a historic low of $26.21, but it rose more than 50% in the following months. The global benchmark, Brent crude, followed a very similar pattern in the first half of 2016.