Q. Is it my imagination, but am I getting fewer fevers than I did when I was younger?
The immune system doesn't function as efficiently in older adults as it does in younger people.
The body's fever response to infection is not always automatic in elderly people. More than 20 percent of adults over age 65 who have serious bacterial infections do not have fevers.
This brings us to germs, which are defined as microbes that cause disease. Infectious diseases caused by microbes are the leading cause of death.