Immunisation Session Conduct
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Direct answer
A well-conducted immunisation session under India's Universal Immunisation Programme — intensified through Mission Indradhanush drives to close coverage gaps — runs on a fixed sequence: microplan and due list prepared from Mother-Child Protection (MCP) cards and registers, vaccines carried with the cold chain monitored and vaccine vial monitors (VVM) checked, beneficiaries screened, doses given with auto-disable (AD) syringes, every dose recorded on the MCP card and register, waste segregated per biomedical waste rules, and adverse events following immunisation (AEFI) readiness. The three most examined details are the open vial policy, VVM discard stages, and the recording that turns a vaccinated child into a counted one.
What you must remember
- Session planning spine: the ANM's microplan fixes site, date and time; the due list is drawn from MCP cards, village registers and the ANM diary; stations are arranged in flow order before beneficiaries arrive.
- Cold chain: vaccines carried with conditioned ice packs at 2-8 degrees Celsius; the shake test detects freeze damage to sensitive vaccines.
- VVM reading: a vial whose inner square matches or is darker than the reference circle is discarded regardless of expiry — cumulative heat exposure, not a thermometer, decides the vial's fate.
- Open vial policy: liquid vaccines in multi-dose vials — pentavalent, hepatitis B and OPV — may be used up to 4 weeks after opening if expiry has not passed, cold chain was maintained and the VVM is usable; reconstituted vaccines (BCG, measles-rubella, JE) are discarded at the end of the session or within about 4 hours, whichever is earlier.
- Injection safety: one AD syringe per dose, separate reconstitution syringes, no recapping, sharps into the hub cutter, cut syringes into the red bin.
- Screening at entry: check the card for the due antigen, screen illness (mild illness is not a contraindication), and follow valid contraindications — not myths.
- Recording and AEFI: every dose entered on the MCP card, register and tally immediately, with defaulter tracking after the session; AEFI recognised, managed and reported through the established channel.
A village session, hour by hour
The session is fixed for ten in the morning at the anganwadi centre; preparation began the previous evening: the due list compiled — fourteen infants and three pregnant women — vaccines issued against the indent, carrier packed with conditioned packs. The site is arranged as stations in flow order: screening and card verification, vaccination, the thirty-minute observation period, then the waste corner. At screening a grandmother reports fever after the last dose — the child is afebrile and well today, so the dose proceeds with counselling: mild post-vaccination fever is expected, not a contraindication; the genuinely unwell child is deferred.
At the vaccination table: hand hygiene between children, the VVM on every vial checked before drawing, BCG reconstituted with its own diluent and syringe and labelled with time, AD syringes used once. Recording is simultaneous — each dose written on the MCP card with the next due date stated aloud, the register tallied. When the last child leaves: reconstituted BCG and MR discarded per policy, pentavalent and OPV with usable VVMs returned to cold chain with date labels, sharps segregated, counts reconciled, defaulters marked for follow-up. An Intensified Mission Indradhanush drive repeats this intensely, sweeping children the routine misses.
Where students slip
The open vial policy is the reliable discriminator: students either discard all opened vials (wastage) or keep all (danger) — the split answer is liquid pentavalent, hepatitis B and OPV kept up to four weeks under strict conditions versus reconstituted BCG, MR and JE discarded within the session or roughly four hours. The VVM question trips those who treat it as a temperature strip: it is a cumulative heat-exposure monitor on the vial itself, and a discard-stage square outweighs an unexpired date. Deferring mildly ill children is the commoner screening fault, since mild upper respiratory symptoms are not contraindications. And recording is treated as clerical: the dose not entered is the dose not given for the programme.
Frequently asked questions
How long can an opened pentavalent vial be used under the open vial policy?
Up to 4 weeks after opening, provided expiry has not passed, cold chain at 2-8 degrees Celsius was maintained, and the VVM is usable.
When must reconstituted BCG and measles-rubella vials be discarded?
At the end of the session or within about 4 hours of reconstitution, whichever is earlier, because they lack preservative stability once reconstituted.
What does a vaccine vial monitor show?
Cumulative heat exposure: the inner square darkens with heat, and once it matches or exceeds the reference circle the vial is discarded even if unexpired.
Is mild illness a contraindication to vaccination?
No — a child with mild upper respiratory infection or low-grade fever is vaccinated; deferral is reserved for genuinely unwell children per programme guidance.
What recording must follow every dose given at a session?
Immediate entry on the MCP card with the next due date told to the caregiver, the immunisation register, and tally reconciliation with the due list for defaulter tracking.