What is PWT?

Personal Temperature Facts

For centuries, 98.6 ℉ (37 ℃) was said to be the average, normal body temperature. However, more recently, researchers have known normal body temperature is actually lower than 98.6 ℉ and can vary by gender, size, age, time of day, and other factors.

Not only has body temperature dropped since German Physician Carl Reinhold August Wunderlich’s study in 1851 established the average body temperature of 98.6 ℉, but it has also dropped since the 1970s. 100.4 ℉ was widely adopted as the definition of a fever based on adding 1 ℃ (1.8 ℉) to 37 ℃ (98.6 ℉).

Therefore, 100.4 ℉ is
much too high to
declare a fever
symptom and
one size doesn’t
fit all,

thus missing a large number
of potentially contagious individuals.

The PWT System

What is It?

The Personal Warning Temperature System (referred to as PWT) is a web-based personal body temperature recording and analysis system for detecting potential illness before traditional symptoms appear.

The system is comprised of an oral thermometer (not provided), software database to record daily temperatures, and an algorithm to calculate an individual’s average temperature and a warning temperature unique to them.

An Example of