Give a detailed note on 'Triple Vaccination'.

Question

Ghissu Editorial · Accepted Answer

Triple vaccination is the DPT (triple antigen) vaccine, which protects children against diphtheria, pertussis and tetanus using two toxoids and a pertussis component. Under India's Universal Immunisation Programme it is given within the Pentavalent vaccine at 6, 10 and 14 weeks, followed by DPT boosters and Td.

**Introduction**

Triple vaccination refers to the ==triple antigen (DPT) vaccine==, which protects children against diphtheria, pertussis (whooping cough) and tetanus in a single shot. It has been a core part of India's Universal Immunisation Programme (UIP) since 1985, including in ==Andhra Pradesh==.

**Diseases Covered**

1. **Diphtheria**: A toxin-mediated infection by Corynebacterium diphtheriae that forms a throat membrane and can damage the heart.
2. **Pertussis**: Whooping cough caused by Bordetella pertussis, dangerous for infants.
3. **Tetanus**: Caused by the toxin of Clostridium tetani entering through wounds or an unclean umbilical cord, producing painful spasms.

**Composition**

The vaccine combines diphtheria and tetanus toxoids (toxins inactivated with formaldehyde) with killed whole-cell pertussis (DTwP) or purified acellular pertussis antigens (DTaP), adsorbed on an aluminium salt adjuvant.

**Schedule in India**

1. **Primary doses**: Given as part of the Pentavalent vaccine (DPT, hepatitis B and Hib) at 6, 10 and 14 weeks.
2. **Boosters**: DPT at 16 to 24 months and 5 to 6 years, then Td at 10 and 16 years and for pregnant women.

**Significance**

1. **Child survival**: It sharply cut infant deaths from diphtheria and whooping cough.
2. **Tetanus elimination**: Tetanus vaccination and clean deliveries helped India eliminate maternal and neonatal tetanus in 2015.
3. **Efficiency**: One injection protects against three diseases, saving visits and costs.

**Challenges and Way Forward**

Fever and pain from the whole-cell pertussis component feed hesitancy, dropouts leave children without boosters, and DPT is damaged by freezing. Tracking every child digitally in ==Andhra Pradesh==, Mission Indradhanush catch-up rounds, counselling parents on side effects and protecting the cold chain can close these gaps.

**Conclusion**

DPT triple vaccination remains one of the most effective child health tools; sustaining primary and booster coverage will keep diphtheria, pertussis and tetanus under control.

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