Hand Hygiene, Illness Exclusion, and Infectious Disease Prevention

Why Hand Hygiene Matters in Preschool Settings

Preschool classrooms are high-touch environments where infectious diseases spread quickly among young children whose immune systems are still developing. Hand hygiene is consistently identified by public health authorities, including the CDC and the American Academy of Pediatrics (AAP), as the single most effective way to interrupt the spread of illness in group child care settings. For preschool teachers, correct handwashing is both a professional skill and a legal obligation under most state child care licensing rules.

The CDC 20-Second Handwashing Technique

The CDC recommends the following steps for effective handwashing with soap and water:

1. Wet hands with clean, running water (warm or cold).

2. Apply soap — enough to lather all surfaces.

3. Lather by rubbing hands together, covering the backs of hands, between fingers, and under fingernails. This mechanical friction is what loosens pathogens.

4. Scrub for at least 20 seconds — roughly the time it takes to hum "Happy Birthday" twice.

5. Rinse thoroughly under clean, running water.

6. Dry with a clean paper towel or air dryer.

7. Turn off the faucet using the paper towel, not bare hands, to avoid re-contamination.

Alcohol-based hand sanitizer (at least 60% alcohol) is an acceptable substitute when soap and water are unavailable, but it is not effective against all pathogens (for example, norovirus and Clostridioides difficile require soap and water). Never use hand sanitizer as a routine replacement in a child care setting when a sink is accessible.

Safety note: Keep hand sanitizer stored and dispensed out of children's reach; ingestion can cause alcohol poisoning in young children.

Illness Exclusion: The CFOC4 Framework

Caring for Our Children: National Health and Safety Performance Standards, 4th Edition (CFOC4), is the primary reference document for child care health and safety practice in the United States. It is produced jointly by the AAP, the American Public Health Association (APHA), and the National Resource Center for Health and Safety in Child Care and Early Education.

CFOC4 provides guidance (in its appendices and relevant standards) on when a child must be excluded from group care to protect other children and staff. Key exclusion principles include:

• Fever: A child with a fever (generally defined as temperature above 101°F / 38.3°C by mouth, or the equivalent by another method) combined with behavior change or other symptoms should be excluded until fever-free without fever-reducing medication for a defined period — consult current CFOC4 and your state licensing rule for the specific threshold and duration, as these can be updated.
• Vomiting or diarrhea: Two or more episodes in the previous 24 hours generally require exclusion until the child has been symptom-free for a period specified by the applicable standard, or a health provider clears them.
• Conjunctivitis (pink eye): Bacterial conjunctivitis typically requires exclusion until treatment has begun and the eye is no longer draining, unless a health provider determines it is non-infectious. Viral conjunctivitis guidance varies; follow your state rule and CFOC4.
• Rash with fever or behavior change: Exclusion is required when a rash is accompanied by fever or the child appears ill. A rash alone without other symptoms may not require exclusion — always consult CFOC4 and your program's health consultant.
• Head lice (pediculosis): CFOC4 and many leading pediatric organizations no longer recommend routine exclusion for live lice or nits alone; communicate with the family for treatment without necessarily sending the child home mid-day. Check your state rule, which may differ.
• Runny nose (rhinorrhea): A clear runny nose without fever or behavior change is generally not a reason for exclusion, as it is a common and usually non-infectious symptom. Colored discharge with other symptoms warrants further evaluation.

Always document the reason for any exclusion decision in writing and notify the family immediately. An excluded child must be supervised safely until a parent or guardian arrives.

Daily Health Check: Your First Line of Defense

Most state licensing standards require staff to conduct a daily health check of each child upon arrival. The purpose is to identify signs of illness before the child joins the group. A proper check involves brief observation of:

• Appearance and behavior — Is the child alert and interactive?
• Skin — Any rash, unusual spots, or jaundice?
• Eyes — Redness, discharge, or swelling?
• Nose and throat — Discharge, complaints of sore throat?
• Temperature — If the child appears ill.

A written log must be maintained. Typical required fields include: date, child's name, arrival time, staff name, observations noted, and any action taken (family notified, exclusion decision, referral to program health consultant).

Safety Considerations in This Lab

• The UV lotion used in the GlitterBug activity is non-toxic but should be kept out of eyes. Wash hands before touching your face.
• UV flashlights emit low-intensity ultraviolet light; do not shine them directly into anyone's eyes.
• Handle all symptom scenario cards as paper documents only — no infection risk applies, but practice the professional habit of clean hands before and after any patient-related task.

Connecting to Your Credentials

Both the CDA credential (Council for Professional Recognition) and your state child care license require demonstrated competency in health and safety practices. CDA Competency Standard II covers a safe and healthy learning environment. State licensing inspectors often review health check logs as part of compliance visits. A properly completed daily log protects children, protects you legally, and demonstrates professional competence.