5.1 National Immunization Program (NIP) and Child Health Services

National Immunization Program (NIP) and the Expanded Program on Immunization (EPI)

The Expanded Program on Immunization (EPI), established in the Philippines in 1976 and continuously updated, aims to reduce infant and child morbidity and mortality caused by vaccine-preventable diseases. The legal basis for compulsory immunization in the country is Republic Act No. 10152 (Mandatory Infants and Children Health Immunization Act of 2011), which mandates basic immunization services for infants and children under five years of age. This law highlights the nurse's role in health education, administration, and monitoring.

EPI Vaccine Details

The Department of Health (DOH) NIP schedule provides early, life-saving protection. Nurses must master the details of each vaccine:

Clinical Nuances of EPI Vaccines:

• BCG (Intradermal Injection): Administered using a tuberculin syringe with a 26G needle, bevel facing upward. A small, white wheal (wheal of 5-8 mm) must form. Inform the mother that a small papule will develop at the site in 2-3 weeks, which may ulcerate and eventually heal with a permanent scar. Apply no dressings, ointments, or alcohol to this papule.
• Pentavalent Vaccine: Common reactions include local swelling, tenderness, and mild-to-moderate fever. Critical Contraindication: If a child experiences encephalopathy within 7 days or an anaphylactic reaction to a previous dose of DPT, subsequent doses of DPT/Pentavalent are contraindicated. The pertussis component is usually the cause of severe febrile seizures or neurological reactions.
• Rotavirus Vaccine: Administered orally. Crucial Rule: The first dose must not be given to infants older than 15 weeks, and the last dose must be completed by 32 weeks of age due to the increased risk of intussusception.
• Tetanus Toxoid (Td) Schedule for Pregnant Women: To prevent neonatal tetanus (caused by Clostridium tetani entering through the umbilical stump), pregnant women are immunized according to the following schedule:
  • Td1: First contact or as early as possible during pregnancy. No protection.
  • Td2: 4 weeks after Td1. Provides 3 years of protection for the mother and prevents neonatal tetanus in the newborn.
  • Td3: 6 months after Td2. Provides 5 years of protection.
  • Td4: 1 year after Td3. Provides 10 years of protection.
  • Td5: 1 year after Td4. Provides lifetime protection for the mother.

The Vaccine Cold Chain System

The cold chain is the system of personnel, equipment, and logistics that maintains vaccine potency from manufacturing to administration. Vaccines are biological substances that lose potency irreversibly if exposed to temperatures outside their recommended ranges.

Storage Temperatures:

1. Freezer (-15°C to -25°C): Used at regional/national depots for live attenuated vaccines, particularly Oral Polio Vaccine (OPV) and Measles/MR/MMR vaccines.
2. Refrigerator Body (+2°C to +8°C): Used at the rural health unit (RHU) level. All vaccines are stored here. Live vaccines must be stored on the top shelf, whereas inactivated vaccines (Pentavalent, Hepatitis B, PCV, Td) must be stored on the middle shelves, never touching the freezer compartment or walls. Diluents must also be cooled to +2°C to +8°C before reconstitution.

Sensitivity Matrix:

• Freeze-Sensitive (Must NEVER be frozen): Pentavalent, Hepatitis B, PCV, Td. Freezing causes these vaccines to precipitate, permanently destroying the antigen-adjuvant bond. If freezing is suspected, perform the Shake Test (compare the sedimentation rate of the suspect vial with a control vial that was deliberately frozen; if the suspect vial settles quickly, it has been frozen and must be discarded).
• Heat-Sensitive (Must be protected from heat): OPV is the most heat-sensitive, followed by Measles/MR/MMR, and BCG.

Vaccine Vial Monitors (VVM):

A VVM is a chemical indicator label printed directly onto the vaccine vial. The inner square changes color under cumulative heat exposure:

• Stage 1: Inner square is lighter than the outer circle. (Usable - Potent)
• Stage 2: Inner square is still lighter than the outer circle but starting to darken. (Usable - use these vials first)
• Stage 3: Inner square matches the color of the outer circle. (Do NOT use - Discard immediately)
• Stage 4: Inner square is darker than the outer circle. (Do NOT use - Discard immediately)

First Expired, First Out (FEFO) Policy:

The DOH strictly enforces the FEFO policy, which dictates that vaccines with the closest expiration dates must be utilized first, regardless of when they arrived at the health center. This differs from FIFO (First In, First Out), as a newly arrived batch might have an earlier expiration date than the older stock.

Integrated Management of Childhood Illness (IMCI)

IMCI is a standard WHO/UNICEF clinical protocol designed to manage childhood illness syndromically. It targets children from 1 week to 5 years of age, divided into two age-specific cohorts:

1. Young Infant (1 week to 2 months): Focuses on bacterial infection, jaundice, diarrhea, and feeding problems.
2. Sick Child (2 months to 5 years): Focuses on general danger signs, cough/difficult breathing, diarrhea, fever, ear problems, and malnutrition/anemia.

General Danger Signs (Must assess in every child 2 months to 5 years):

The nurse must immediately assess the four general danger signs:

1. Inability to drink or breastfeed: The child is too weak to suck or swallow.
2. Vomits everything: The child cannot retain any fluids or food.
3. Convulsions during this illness: History of fits or active convulsing.
4. Lethargic or unconscious: The child is abnormally sleepy or unresponsive to touch/voice.

Color-Coded Triage and Management Pathways:

IMCI uses a traffic-light color system to guide nursing decisions:

Specific IMCI Pre-Referral & Treatment Guidelines:

• Pneumonia: Classified based on respiratory rate (fast breathing thresholds: ≥50 breaths/min for 2-11 months; ≥40 breaths/min for 12-59 months) or chest indrawing. Yellow classification is treated with oral Amoxicillin for 3 days. Severe Pneumonia (Pink) presents with chest indrawing or general danger signs, requiring a pre-referral dose of intramuscular Ampicillin or Benzylpenicillin.
• Diarrhea: Classified by dehydration level:
  • Severe Dehydration (Pink): Lethargic, sunken eyes, skin pinch goes back very slowly (>2 seconds). Pre-referral treatment: IV fluids (Lactated Ringer's) immediately using Plan C.
  • Some Dehydration (Yellow): Restless/irritable, sunken eyes, skin pinch goes back slowly. Treat with ORS and Zinc for 10-14 days using Plan B.
  • No Dehydration (Green): No signs. Maintain hydration with oral fluids and Zinc using Plan A.

Clinical Scenarios and Board Exam Traps:

• The Diagnostic Trap: Examinees are often tempted to select answers that involve performing diagnostic lab tests (e.g., chest X-rays, CBC) when a child presents with fast breathing. Under IMCI, the nurse must classify based on clinical signs (e.g., fast breathing = Pneumonia) and immediately initiate treatment or referral, as laboratory diagnostics are not available in standard rural health stations.
• The Referral Delay Trap: Never delay referral for a child with a Pink classification to run diagnostic checks or monitor them at the health center. The first dose of pre-referral medication must be given, and the child must be transferred immediately.