If a child contracts walking pneumonia, is it contagious and will they need to stay home from school?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Walking pneumonia in children is a mild lung infection, most often caused by Mycoplasma pneumoniae bacteria. Common symptoms include a persistent dry cough, low-grade fever, fatigue, sore throat, and headache. Because kids often feel well enough to keep up with daily activities, the illness is easy to miss—but it is contagious and can spread through coughing and sneezing. Knowing when to keep your child home from school and when to seek care is key to recovery and preventing outbreaks.

If your child has lingering cough, fatigue, or fever, don't guess—get clarity. A free, instant, online symptom check can help you understand possible causes, gauge urgency, and decide your next steps in minutes. It's private, doctor-developed, and could save you an unnecessary trip—or flag something that needs prompt attention.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Contagiousness

Transmission: Walking pneumonia is contagious, but it is generally less contagious than other forms of pneumonia caused by bacteria or viruses. It spreads through respiratory droplets when an infected person coughs or sneezes. Close contact with an infected individual can increase the risk of transmission.
Incubation Period: The incubation period for Mycoplasma pneumoniae can range from 1 to 3 weeks, meaning a child may be contagious before symptoms appear.

School Attendance

Staying Home: If a child is diagnosed with walking pneumonia, it is advisable for them to stay home from school, especially if they are experiencing significant symptoms such as a persistent cough, fatigue, or fever. This helps prevent the spread of the infection to other children and allows the sick child to rest and recover.
Return to School: A child can typically return to school once they have been on appropriate antibiotic treatment for at least 24 to 48 hours and their symptoms have improved. If you're concerned about your child's symptoms, try our free AI symptom checker to help determine next steps, but it is important to consult with a healthcare provider for specific recommendations based on the child's condition.

(References)

Shim JY. Current perspectives on atypical pneumonia in children. Clin Exp Pediatr. 2020 Dec;63(12):469-476. doi: 10.3345/cep.2019.00360. Epub 2020 Jun 10. PMID: 32517424; PMCID: PMC7738772.
Kevat PM, Morpeth M, Graham H, Gray AZ. A systematic review of the clinical features of pneumonia in children aged 5-9 years: Implications for guidelines and research. J Glob Health. 2022 Mar 26;12:10002. doi: 10.7189/jogh.12.10002. PMID: 35356655; PMCID: PMC8943783.
Parrott GL, Kinjo T, Fujita J. A Compendium for Mycoplasma pneumoniae. Front Microbiol. 2016 Apr 12;7:513. doi: 10.3389/fmicb.2016.00513. PMID: 27148202; PMCID: PMC4828434.

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