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Nothing can take the fun out of a vacation quite like getting sick. Whether it’s a cold, the flu, or gastrointestinal troubles, you’re going to remember the vacation for all the wrong reasons if you fall ill.

“Although you can’t always prevent getting sick, there are some things you can do before, during and after your vacation to help you stay well,” said Frank Olshemski, MD, family medicine doctor at Geisinger N. Washington in Wilkes-Barre.

Rest up and de-stress

You may be planning to rest and relax on your vacation, but rest before your trip can help keep you healthy.

“Getting enough sleep on a regular basis is a key component in boosting your immune system,” Dr. Olshemski said. Research has shown that insufficient sleep can increase your risk of catching a cold or flu.

Stress has also been shown to lower your immune system’s ability to keep you healthy. Even though you may be worried about a litany of things at work and about your travel plans, find moments to take a deep breath and relax. Relief is on the way!

Visit your doctor

If you’re planning to travel internationally, you should make an appointment to see your primary care physician.

“Depending on where you’re traveling, you may need vaccinations, especially if you’re going to certain parts of developing countries,” Dr. Olshemski said. “Your doctor will be able to tell you what vaccines you may need as well as provide you with education and prescriptions for illnesses like malaria and traveler’s diarrhea.”

If you’re on prescription medications or are managing a chronic health condition such as diabetes, a visit to your doctor will ensure you don’t run out of your medications, and you’ll know how to take care of yourself away from home.

Prepare to fight germs

If you’re flying to your vacation destination, make sure you pack a TSA-friendly bottle of hand sanitizer and disinfecting wipes in your carry-on bag.

“There’s an incredible amount of germs for you to pick up in an airport, plane and any other form of public transportation,” Dr. Olshemski said. “Bringing hand sanitizer will help you keep your hands clean even if you don’t have access to soap and water.”

You’ll be happy you brought along a bottle of sanitizer and disinfecting wipes when you arrive in your vacation destination too – you’ll be able to ward off germs no matter what activity you’re doing or site you’re seeing.

And, just as you would at home, try to avoid coming in contact with someone who’s sick. If you hear someone coughing and sneezing or see someone who looks like they’re sick, just keep your distance.

Pack to protect your health

Your mind may get preoccupied thinking about what clothes to bring on your trip, but don’t forget all of the things you need to protect your health while you’re away.

“If you’re planning to spend time outside, make sure you have sunscreen and insect repellent with you,” Dr. Olshemski said. “You’ll need both to protect yourself from cancer-causing sunburns and mosquito-borne illnesses.”

In addition to any prescriptions you’re taking, you should also consider packing antihistamines, Pepto-Bismol or another antidiarrheal medication, decongestants, medicine for pain or fever, antacids, and cough suppressants or expectorants.

“Although you may not want to plan on someone getting sick during vacation, bringing everything you may need in case it happens can help you or your travel companion feel better quicker and get back to the vacation fun,” Dr. Olshemski said.

Drink plenty of water

The average person needs to drink 2 liters of water per day to stay hydrated, and that’s if they’re not doing any major physical activity and are in an average temperature environment. Drinking plenty of water to stay hydrated is important, especially on vacation.

“Even getting slightly dehydrated can mean headaches, dizziness, lightheadedness, muscle weakness and fatigue,” Dr. Olshemski said.

Dehydration can occur much quicker in high temperatures, too.

“If you’re in a hot climate, make sure to drink plenty of fluids to stay hydrated,” Dr. Olshemski said. “This allows your body to sweat and maintain a normal temperature, preventing a heat-related illness.”

Taking a flight to your vacation? Staying hydrated is important here too.

“There’s a significant lack of humidity in planes’ cabin air – it typically has a humidity of 10 to 20 percent whereas typical indoor humidity is 30 to 65 percent,” Dr. Olshemski explained. “The lack of humidity makes it easy for you to get dehydrated during your flight.”

Staying hydrated doesn’t just mean drinking plenty of water – it also means avoiding beverages that can dehydrate you, including caffeinated beverages and alcohol.

Frequently wash your hands

Just like at home, regularly washing your hands is key in avoiding getting sick.

“Frequently washing your hands means you’ll be less likely to transfer germs into your system that can make you sick,” Dr. Olshemski said.