No parent likes to see a sick child especially when the mercury rises into the red.

But a little fever isn't necessarily something to panic over, according to Johns Hopkins doctors.

Slight fever may be a good thing, because experts say most viruses can't survive at temperatures higher than 101 degrees.

In general, parents had trouble recognizing what's considered normal temperature, which is anywhere from 97 to 100. 3 degrees.

The only exception is in babies under three months old, whose immune systems often aren't equipped to fight off infections.