Initially, the flu may be shrugged off as just a common cold due to similar symptoms—such as a seem runny nose, sinus congestion, sneezing, and sore muscles and throat.
However, a prime differentiator between cold vs. flu is that similar symptoms will come on and worsen gradually with a cold, compared to a flu which hits suddenly and hard with the following symptoms…
1. Fever
The initial sign that you have the flu, and not just a routine cold, will be a high fever that soars between 102- and 106-degrees Fahrenheit (or 38-degrees Celsius). Typically, children’s fevers will be higher than adult fevers and can last 3 to 4 days before breaking.