[ TIPS · THE DISPATCH ]

How to Avoid Getting Sick on Your First Two Days in a New Country

How to not get sick traveling in those fragile first 48 hours: why jet lag tanks your immunity, the truth about hand sanitizer, and easing into street food instead of cannonballing in.

If you want to know how to not get sick traveling, the secret is that the first two days are where most trips get derailed, and almost nobody plans for them. You land, you’re wrecked, you’re excited, you go hard — and then day three you’re horizontal in a hotel bathroom wondering where it all went wrong. It went wrong on day one, when your body was at its most fragile and you treated it like it was bulletproof. It is not bulletproof. Especially not right off a plane.

Let me set the scene from personal experience. Bangkok, first big solo trip, landed at dawn after twenty-something hours in the air. Did I rest? I did not. I went straight out, ate everything, drank tap-ice in a smoothie because it was hot and I was stupid, stayed up to “beat jet lag.” Day three I lost to a fever and a stomach that had clearly filed a formal complaint. Cost me two of my eight days. Never again, and here’s what I do now instead.

Here’s the bit the guidebooks skip. A long-haul flight is genuinely hard on you. You’re dehydrated from the dry cabin air, your sleep is shredded, your circadian rhythm is somewhere over the ocean, and all of that drags your immune system down right when you’re walking into a completely new environment full of bugs your body has never met. So you arrive at your most exposed and your least defended. Bad combination.

Which means day one is not the day to push. I know, I know, you’re excited and the clock’s ticking on a short trip. But the smartest thing you can do for the whole rest of the journey is take the first day at maybe seventy percent. Hydrate like it’s your job — water, lots of it, the second you land and all day. Get some real food, not just plane snacks and a beer. And if you can grab even a short proper sleep on the new time zone, your immune system claws back a huge amount of ground.

Easing in isn’t lazy. It’s an investment. A calm first day buys you a strong rest-of-trip. A reckless first day cashes in your whole holiday for one night of feeling invincible.

People put enormous faith in hand sanitizer, and it does help, but let’s be honest about what actually makes travelers sick. Most of the classic traveler’s-tummy situations aren’t from some exotic mystery bug — they’re the boring fecal-oral route, which is a polite way of saying something got onto your hands and then into your mouth. Your own hands are the delivery system more often than the food itself.

So the highest-value habit isn’t sanitizer, it’s clean hands before you eat, every time, no exceptions. Soap and water when you can find it, properly, for longer than feels necessary. Sanitizer is the backup for when there’s no sink — and there’s often no sink at exactly the moment you’re about to eat with your fingers at a stall. Keep a small bottle in your pocket, not the bottom of your daypack, so it’s actually there when the food arrives.

And mind the stuff people forget: the ice in your drink, the salad rinsed in tap water, the fruit you didn’t peel yourself, the glass that was “washed.” In a lot of places the water is the risk, not the cooking. Bottled or filtered water, skip the ice if you’re unsure, and eat fruit you peel with your own clean hands. Boring rules. They work.

This is the one I most want you to hear, because street food is one of the best parts of travel and I am NOT telling you to avoid it. I’m telling you to let your stomach get to know the place first. Your gut has a whole population of bacteria tuned to your home food, and dropping it into a brand-new world of different microbes, spices, and oils all at once, on night one, while jet-lagged — that’s a lot to ask of it.

So I pace it. The first day or two I lean slightly gentler: cooked, hot, simple things, served piping hot in front of me. Then I widen out. By a few days in, my stomach has acclimatized and I can handle the wild stuff — the fermented, the funky, the deep end — far better than I could have on arrival. Same food. Different readiness. The cannonball gets you sick; the gradual wade-in gets you everything, just a little later and without the fever.

A few non-negotiables wherever you are: hot and freshly cooked beats sitting-out-lukewarm every time, busy beats empty, and if a place makes the back of your neck prickle, trust it and walk on. The food’ll still be there tomorrow when you’re better acclimated anyway.

And pack a tiny just-in-case kit — oral rehydration salts especially, because if something does get you, dehydration is what actually flattens you, and a packet of rehydration salts will turn a brutal day into a manageable one. Hope you don’t need it. Bring it anyway.

Look, you’ll probably still have one slightly dodgy meal somewhere on a long trip, that’s just the math. But protect those first 48 hours — rest, hydrate, clean hands, ease in — and you stack the odds so far in your favor that the trip-ruining version almost never comes.

Treat your first two days like recovery days, not a sprint, and you’ll spend the rest of the trip eating everything in sight instead of staring at a hotel ceiling wondering what you did wrong.

This article contains affiliate links marked rel="sponsored". We may earn a commission at no extra cost to you.