White blood cells also make chemicals that cause a fever. A fever is a higher-than-normal body temperature. Normal human body temperature is 98.6°F (37°C). Most bacteria and viruses that infect people reproduce fastest at this temperature. When the temperature is higher, the pathogens cannot reproduce as fast, so the body raises the temperature to kill them. A fever also causes the immune system to make more white blood cells. In these ways, a fever helps the body fight infection.
Consider the following text:
Jeremy and Becky are both home from school today and their mother is taking their temperature. After seeing the results on the thermometer, his mother is contemplating taking Jeremy to the doctor because he is running a much higher fever than Becky.

Who currently has more white blood cells?