It sounds counterintuitive. You spent three years in Lagos, eighteen months in Accra, or a posting across several West African countries.

In 2025, a senior management consultant missed a last-minute project in Angola. She had received her yellow fever vaccine years earlier and was fully protected.

You have a valid yellow fever certificate. The vaccinations are booked. The itinerary is printed and pinned to the fridge. You have done the research, and you feel confident everything is covered.

Here is the short answer: probably not. Finding out you need travel jabs four weeks before your flight feels like a crisis, but for the vast majority of popular holiday destinations, four weeks is a workable window.

You booked the Thailand holiday last week. Flights confirmed, hotel sorted, two weeks of guaranteed sunshine on the horizon.

You confirmed the flights for Delhi in July. You booked a travel health consultation, worked through the recommended vaccines, and left the clinic protected.

Vietnam has cemented itself as one of the most compelling backpacking destinations on the planet. The Ha Giang Loop winds through limestone karst mountains in the far north, Mekong Delta homestays put you inside rural Vietnamese life in a way that no hotel ever could, and a rented motorbike from Hoi An opens up coastal roads that feel genuinely off the beaten track.

You found a brilliant last-minute deal to Kenya or Thailand, booked it on impulse, and now you are staring at a government travel advice page that mentions yellow fever certificates, typhoid, hepatitis A, and rabies.

For many students, summer is filled with excitement as they prepare to start university. Whether you’re moving into halls, meeting new friends, or beginning a new chapter away from home, there is plenty to think about before term starts.

You’ve spent weeks comparing family resorts, reading reviews of elephant sanctuaries, and perfecting your Thailand itinerary for 2026.

You have been booking flights for years. Three months in Bali, then a work contract in Mexico City, followed by a project in Vietnam. Each time, the same pattern repeats: you finalise the accommodation, sort the visa, book the flights, and then, two weeks before departure, you remember vaccinations.

You have 48 hours before flying to Bangkok, and a panicked Google search says you need six different vaccines. Here is the truth: two of them will actually protect you by departure, three are useless at this stage, and one might still be worth having despite the short window.