Source: News on Air
Subject: Science and technology
Context: Union Health Minister launched the Tetanus and Diphtheria (Td) vaccine at the Central Research Institute, Kasauli, to strengthen India’s national immunization programme.
About Tetanus and Diphtheria (Td) Vaccine:
What it is?
- The Tetanus and Diphtheria (Td) vaccine is a booster immunization that protects individuals against tetanus and diphtheria, two potentially life-threatening bacterial infections.
- It is generally administered after childhood immunization to maintain long-term immunity.
Types:
- Td Vaccine – Protects against tetanus and diphtheria only.
- Tdap Vaccine – Protects against tetanus, diphtheria and pertussis (whooping cough); recommended especially for pregnant women and caregivers of infants.
Key Features:
- Booster dose usually recommended every 10 years: The Td vaccine is given periodically to maintain long-term immunity as protection from childhood vaccination gradually declines over time.
- Can be administered along with other vaccines: It can be safely given during the same visit as other immunizations, improving convenience and overall vaccination coverage.
- Provides continued immunity after childhood vaccination: Acts as a booster to reinforce protection against tetanus and diphtheria during adolescence and adulthood.
- Helps prevent severe complications such as respiratory failure: By preventing infection, the vaccine reduces the risk of life-threatening outcomes linked to toxin-producing bacteria.
- Generally safe with mild side effects: Most reactions are minor and short-lived, making the vaccine suitable for routine preventive use.
- Strengthens community immunity: Higher vaccination coverage lowers infection spread, indirectly protecting vulnerable populations.
About the Tetanus and Diphtheria Diseases:
Tetanus:
- Cause and infection source: Tetanus is a bacterial disease caused by Clostridium tetani, whose spores are commonly found in soil, dust and animal waste.
- Mode of entry and symptoms: The bacteria enter through cuts or wounds and release toxins that cause severe muscle stiffness, spasms and “lockjaw.”
- Severity and prevention: Serious cases can lead to breathing failure and death, but the disease is effectively preventable through timely vaccination and booster doses.
Diphtheria:
- Cause and transmission: Diphtheria is a highly contagious infection caused by Corynebacterium diphtheriae, spreading mainly through respiratory droplets.
- Major health effects: It forms a thick grey coating in the throat, which can block airways and cause serious breathing difficulties.
- Complications and control: If untreated, it may lead to heart and nerve damage, but widespread immunization has significantly reduced its incidence worldwide.
