Dr. Claudia Emami of Ascension Sacred Heart Emerald Coast Says a 100.4 Fever Means Keep Kids Home Until They Go 24 Hours Without One as Holiday Flu Season Starts

When the thermometer reads 100.4 on a school-age child, the plan for the day changes: no school, no daycare, no holiday party until the fever has been gone for 24 hours. That is the rule Dr. Claudia Emami, chief medical officer at Ascension Sacred Heart Emerald Coast, gave parents in a Medical Monday segment on WJHG on Nov. 9, 2026, as the holiday flu season gets going.

Emami, a pediatric surgeon, defines a fever as a temperature of 100.4 degrees Fahrenheit or higher. Her advice is to keep a feverish child home until the child has gone a full 24 hours without one.

What Counts as a Fever on the Thermometer

The 100.4 line Emami used is the standard cutoff in pediatric guidance, but where the thermometer goes matters. KidsHealth says a fever is 100.4 degrees (38 Celsius) or higher when taken rectally, in the ear or across the forehead. Oral readings count at 100 degrees, and underarm readings count at 99 degrees.

The same page recommends a digital thermometer. For children 3 and younger, it says a rectal reading is the most accurate. Children 4 and older who can cooperate can have their temperature taken by mouth, and ear readings are acceptable from 6 months. Forehead and underarm readings are the easiest but less accurate.

The Centers for Disease Control and Prevention uses a slightly lower number in its flu guide for parents, calling a fever 100 degrees or higher while noting that cutoffs vary by measurement method and age.

Why 24 Hours Without a Fever Comes Before School

Emami’s reasoning is about spread. Sick children should stay home to limit how far an illness travels, she told WJHG, and the clock does not start until the fever is gone.

The CDC’s guide gives the same window and adds a detail that matters on a busy morning. It says to keep a child home from school, day care or camp until at least 24 hours after the fever has ended, and only if the fever went away without fever-reducing medicine. KidsHealth puts it the same way: the temperature should be normal for 24 hours without medicine before a return to school or child care.

A child whose fever is only down because of medicine has not yet met that standard. The CDC’s guide also notes that some children with flu never develop a fever, so a child with cough, body aches and fatigue may still be contagious. For anyone with flu, the CDC’s prevention page says to stay home for at least 24 hours and return only when symptoms are improving overall and there has been no fever for that period without medication.

Signs Emami Says Show a Child Is Getting Sicker

Emami told WJHG that a change in activity level can signal illness before other symptoms appear. A lethargic child who is less active than usual may be unwell, even without a high reading.

As an illness progresses, she said, parents should watch for dehydration and for rapid or labored breathing, and should not ignore either one.

National guidance lists more specific warning signs. The CDC’s guide names fast or trouble breathing, bluish lips or face, ribs pulling in with each breath, chest pain, dehydration such as no urine for 8 hours, not being alert or interacting, seizures, and a fever above 104 degrees. It also lists any fever in a child under 12 weeks and a fever or cough that improves and then returns or worsens.

The American Academy of Pediatrics’ HealthyChildren.org adds that parents should call the pediatrician if a child still acts sick after the fever comes down, seems to be getting worse, or has a fever lasting more than 3 days. It also lists a stiff neck, severe headache, severe sore throat, severe ear pain and an unexplained rash among reasons to call right away.

Where Germs Spread From Classrooms to Thanksgiving Tables

Emami said germs move more easily as children come into contact with more people, including at school and at Thanksgiving gatherings. Daycare is a common spot for spread, she said, because young children share small spaces, often skip handwashing and touch surfaces and their mouths.

Stomach bugs, pink eye and other viral illnesses can also move through schools and daycares, according to WJHG’s report.

Emami joined Ascension Sacred Heart Emerald Coast as chief medical officer on March 30, 2026, according to the health system’s announcement. She is a board-certified pediatric surgeon with more than 20 years of clinical and physician leadership experience, and she previously served as associate chief medical officer at Memorial University Medical Center in Georgia.

Parents who want a checklist for a sick day can find one in the site’s earlier report on what a Tennessee children’s hospital pediatrician says to have ready. Families with a baby under 12 weeks should read the separate guide on why a 100.4 reading in a newborn needs immediate care, since that situation is handled differently from a school-age fever.

Hand Washing, Clean Surfaces and Flu Shots Before the Holiday

Emami’s prevention list was short: wash hands, especially before eating, clean high-touch surfaces and cover sneezes and coughs.

The CDC’s prevention guidance lines up with that list. It also advises avoiding close contact with sick people, avoiding touching the eyes, nose and mouth, and bringing in fresh outdoor air or gathering outdoors when possible.

On vaccines, Emami said flu shots may not prevent illness entirely, but keeping children’s shots up to date can significantly reduce how severe symptoms get. The CDC recommends that everyone 6 months and older get a flu vaccine every season, ideally by the end of October, and says vaccination should continue as long as flu poses a threat in the community.

For a parent holding a thermometer that reads 100.4, the rule from the Florida hospital executive and national guidance is the same: stay home, watch for the warning signs, and count 24 hours from the last fever.

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This article was produced with AI assistance and edited for accuracy against the sources linked above.

Image: Shixart1985 – CC BY 2.0/Wikimedia Commons