People commonly run themselves down leading up and into a WDW trip. Travel can be stressful. People often arrive already sleep deprived and continue until too exhausted. Hydration. It’s enough to take a toll on our immune system making us more susceptible to the germs we encounter.
Local communities each have waves of predominant strains that differ area to area, but a place like WDW has endless new arrivals bringing all/most of them in at the same time. Atlanta, Biloxi and Toronto could be hot with different things currently and people from each area are visiting WDW and some of them end up sharing. WDW is constantly getting every active thing introduced from all over.
So you have lowered immune defense, more things going around, and… new arrivals from all over in close proximity for somewhat long durations of time. It’s a recipe for increased chance of illness.
Try to keep up on sleep, stay hydrated, eat well, and avoid as much stress as possible. Don’t make travel plans a nail biter - leave healthy cushions of time. If delays happen try not to bug out - take a deep breath. Drink that water even if you hate the airplane toilet. Don’t leave everything to the last minute and get some sleep before travel and don’t run yourself ragged with a crazy travel and park touring schedule. Wash your hands. Don’t touch your face or mouth without washing hands first. Try not to be in other people’s personal space bubble especially if you suspect sick. You can’t 100% prevent the possibility of catching something. You can reduce the chances. Which reminds me - it’s almost 2 months till our trip and it’s been almost 2 years since my last booster
I’m overdue. Time to fix that.