Travel Vaccines for Pregnant Travellers and Young Children: What's Safe, What to Delay

Most travel health advice assumes a healthy, non-pregnant adult. Pregnancy and early childhood change that calculation in specific, well-documented ways — some vaccines are contraindicated, some malaria medications switch entirely, and the "start a few weeks early" timing advice that works for most travellers gets considerably less flexible.

This isn't a reason to assume travel is off the table. With planning — ideally starting well before you'd normally think about it — safe travel during pregnancy and with young children is entirely possible. This post walks through the logic so you know what questions to ask; it doesn't replace an actual pre-travel consultation, which matters more here than almost anywhere else on this site.

The core rule: live vaccines and pregnancy

Most vaccines fall into one of two categories — inactivated (killed virus or bacteria, or a fragment of one) or live-attenuated (a weakened but still-living version of the pathogen). The general rule in pregnancy is straightforward: live vaccines are avoided, because of a theoretical risk to the fetus, while inactivated vaccines are generally considered safe when the benefit outweighs the risk.

Common live travel vaccines include MMR (measles, mumps, rubella), the oral typhoid vaccine, and yellow fever. Common inactivated ones include hepatitis A, injectable typhoid, Japanese encephalitis, rabies, and polio (as IPV).

Yellow fever is the one exception worth knowing well. It's a live vaccine, but pregnancy is classed as a precaution rather than an absolute contraindication — meaning it can still be given if the risk of actually being exposed to yellow fever outweighs the theoretical risk of vaccination. If a pregnant traveller's trip is unavoidable and takes them into a genuine risk area, vaccination may still be the right call after a risk discussion with a travel health provider. If the destination only requires the certificate rather than posing a real exposure risk, a medical waiver letter can sometimes be issued instead — though acceptance of waivers varies by destination and isn't guaranteed at the border. Our yellow fever certificate guide covers how the certificate and transit rules work more broadly.

MMR, by contrast, is avoided in pregnancy without exception, and it's recommended that anyone who receives it wait around four weeks before trying to conceive. If MMR status is uncertain or out of date, this is worth resolving before pregnancy if a trip is on the horizon.

Vaccines that are generally fine in pregnancy

• Hepatitis A — limited safety data, but no signal of increased risk; commonly given when indicated
• COVID-19 — considered safe in any trimester, and specifically recommended given pregnancy increases risk of severe illness
• Tdap — actually specifically recommended during each pregnancy regardless of travel, for pertussis protection in the newborn
• Injectable typhoid (polysaccharide, not the oral live version) — can be given if clearly needed based on exposure risk, even though data is limited
• Inactivated polio, rabies, Japanese encephalitis — generally usable when the destination risk justifies it, following the standard case-by-case discussion any travel vaccine involves

The theme across nearly all of these: it's a risk-benefit conversation, not a blanket rule, and it depends on genuine exposure risk at the destination — not just the fact of travelling.

Malaria prevention changes significantly in pregnancy

This is one of the areas where pregnancy makes the biggest practical difference, because malaria itself is more dangerous during pregnancy — for both parent and fetus — which raises the stakes on both sides of the equation.

• Mefloquine is the only antimalarial recommended for chloroquine-resistant areas during pregnancy, and studies have found no indication of fetal harm.
• Chloroquine can be used in all trimesters, but only works in the shrinking number of areas without chloroquine resistance.
• Doxycycline is contraindicated throughout pregnancy — the tetracycline family is linked to fetal teeth and bone effects.
• Atovaquone-proguanil (Malarone) isn't generally recommended in pregnancy due to limited safety data, though it may be considered if no other option fits.

If a pregnant traveller's destination has chloroquine-resistant malaria and doesn't suit mefloquine for some reason, that's a conversation to have directly with a travel medicine provider well before departure — the options narrow considerably compared with a non-pregnant adult. See our antimalarials guide for how the different drugs compare in general, then layer pregnancy-specific constraints on top.

Bite prevention matters even more here, since it's the one layer of protection with no age or pregnancy restrictions at all — see our mosquito bite prevention guide for what actually works and what's safe to use.

Young children: age is the deciding factor

For kids, the constraint usually isn't pregnancy-style contraindication — it's that a vaccine or medication simply isn't approved, or hasn't been adequately studied, below a certain age.

• Yellow fever vaccine is contraindicated under 6 months of age, and only given between 6–8 months if the risk of exposure is genuinely unavoidable and outweighs the risk of vaccination — most guidance advises delaying travel to a yellow fever area with an infant this young if at all possible.
• Doxycycline for malaria prevention isn't used under age 8, for the same tooth and bone concerns as in pregnancy.
• Atovaquone-proguanil can generally be used in children over roughly 5kg, with a pediatric dose.
• Mefloquine and chloroquine can both be used in children, dosed by weight.
• Most live vaccines (MMR included) are withheld until around 12 months of age as part of routine schedules — this is a routine immunisation timing question as much as a travel-specific one, worth raising with a pediatrician alongside a travel health provider.

For a family trip involving young children, malaria destination choice and timing can end up shaped as much by the child's age as by the itinerary itself — worth factoring in early rather than discovering the constraint a few weeks before departure.

Why timing matters even more here

Ordinary travel vaccine timing advice — a few weeks' lead time — gets tighter with pregnancy and young children for a few reasons: some vaccines may need to be deferred to a specific trimester, some antimalarials need a longer run-in before travel, and pediatric vaccine schedules have their own fixed intervals that don't compress just because a trip is booked. Our general timing guide is a reasonable starting point, but for a pregnant traveller or a family with young children, "as early as possible" is the more honest version of that advice — ideally as soon as travel is being considered, not once it's booked.

Getting the right advice

This is one of the few areas on this site where we'd actively steer you away from planning solo based on general guidance — the risk-benefit calculations above depend on genuine details (trimester, specific destination, specific itinerary, child's exact age and weight) that only a proper consultation can weigh. Use the Travel Vaccine Map tool to get a first read on what a destination generally requires or recommends, then use Find a Clinic to book with a travel health provider — ideally one experienced with pregnancy and pediatric travel medicine specifically, not just general travel vaccination. It's also worth checking your travel insurance policy for any pregnancy-related exclusions or documentation requirements before booking.

Sources: CDC Yellow Book – Pregnant Travelers, CDC Yellow Book – Malaria, CDC Yellow Book – Yellow Fever, CDC – Choosing a Drug to Prevent Malaria.