Typhoid Vaccine (TCV): Who Should Get It and How Long It Lasts

The answer first: the typhoid conjugate vaccine (TCV) is a single injection that can be given from 6 months of age, it protects for several years, and in Pakistan it’s already part of the free routine schedule for babies; older children, adults and travellers should ask their doctor whether they need it, because it lowers the risk of typhoid but never replaces safe water.

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“Teeka lag gaya, ab sab theek.” A lot of parents say this once the typhoid jab is done. Half right. The vaccine is one of the best tools a family in South Asia has against typhoid, and it matters even more now that drug-resistant typhoid has spread in Pakistan. But it’s a seatbelt, not a guarantee.

Here’s what the vaccine is, who it suits at each age, and the questions worth asking your child’s doctor. More monsoon fever guides live in our Barsaat and Flood Season section.

What does the typhoid vaccine actually do?

ELI5 version. Typhoid bacteria wear a sugary coat, and the vaccine shows the body a harmless piece of that coat so the immune system can learn what the enemy looks like and keep antibodies ready for the day a real germ turns up in a glass of water or a plate of chaat.

Older typhoid vaccines used that coat alone, and a baby’s immune system barely noticed it, which is why those vaccines didn’t work well under 2. The “conjugate” in TCV means the sugar piece is joined to a protein that the immune system takes seriously. Babies then respond strongly, and protection lasts longer. Clever, and simple.

There are three kinds you may hear about:

In Pakistan and India, TCV is the one most doctors now reach for. Your doctor picks the type and the timing.

Who should get the typhoid vaccine, age by age

Under 6 months

Too young for any typhoid vaccine. Protection at this age comes from breastfeeding and from the people around the baby washing hands and keeping water and bottles clean. Any fever under 3 months needs a doctor the same day.

6 to 12 months

This is when the routine dose happens in Pakistan, at the 9-month EPI visit. If your baby missed it, ask the vaccinator; a missed dose can be caught up later.

1 to 3 years and 3 to 6 years

Toddlers and nursery children put everything in their mouths, eat outside food at weddings and share water bottles at school, so a child in this band who never had TCV is worth discussing with the doctor, especially in a city with an ongoing typhoid problem.

Over 6 years, teenagers and adults

Children and adults who were never vaccinated can have TCV too. Doctors often suggest it for people who eat outside a lot, hostel students, food handlers, and anyone living in an area with XDR typhoid.

Travellers

Families from abroad visiting relatives in Pakistan, India or Bangladesh are a classic risk group, because they often skip the vaccine thinking they’re “going home”. Book it at least two weeks before the flight so the body has time to respond.

How long does the typhoid vaccine protect?

For TCV, protection appears to last several years after one dose, and the long-term picture is still being filled in as vaccinated children grow up. That’s why doctors sometimes talk about a booster at school age. There’s no single rule for every child yet, so follow the advice at your clinic.

The older Vi polysaccharide injection fades faster, and people who keep living in or travelling to high-risk areas are usually advised to repeat it after about three years. The oral capsules have their own repeat schedule. Keep the card. It answers this in seconds.

After the injection: what’s normal and what’s not

1. Hold and feed. Breastfeed or give the usual milk straight after; it calms most babies within 10 minutes.
2. Leave the spot alone. No oil massage, no hot compress, no rubbing. A cool, clean cloth for a few minutes is fine if it’s sore.
3. Watch for 48 hours. A small red lump, mild fever and crankiness are common and pass in a day or two.
4. Check the temperature. Under a year, a fever of 38 °C or more after a jab is worth a call to the clinic; at any age, 39 °C or more needs a doctor. Our guide to bachon ka bukhar by age covers sponging and when to worry.
5. Keep the card. Write the date and vaccine name if the vaccinator didn’t.

Get emergency help (1122 in Pakistan, 112 in India, or your local emergency number) if, within minutes to hours, the child has swelling of the face or lips, trouble breathing, a widespread rash, or becomes floppy or very hard to wake. These reactions are rare. Still, every vaccination point asks you to wait 15 to 30 minutes for exactly this reason.

Myth: “My child had the vaccine, so street water and gol gappay are fine”

No. The vaccine lowers the chance of typhoid; it doesn’t block every exposure, and it does nothing against the other monsoon stomach bugs such as cholera, hepatitis A and E, and paratyphoid, which is typhoid’s cousin and causes a similar fever. Boiled or properly treated water, clean hands and freshly cooked food stay the everyday defence. Our monsoon stomach infection rules cover water, the fridge and leftovers.

Typhoid vaccine questions parents ask