1st off, congrats! Italy is fabulous. I was there two years ago.
2ndly, are you able to fly long distances with one lung? The air in airplanes can lower O2 sats. I'm sure you have already looked into that, but I never assume anything.
3rdly, don't drink tap water or have ice cubes in your water on the plane. Drink only bottled water. Don't forget coffee and tea- these items are made with airplane tap water too.
4thly, I don't worry so much about airborne germs on planes. Cuz really, there's nothing you can do about it. But what I do worry about is dehydration. It is so easy to get dehydrated on a plane (and not realize it, especially on long flights). Dehydration gives PA a great opportunity to grow. This goes for walking around in Italy as well - it's super hot there this time of year.
5th, contact the CFF and identify local CF centers/hospitals in the cities in Italy where you are going. So in case something happens you'll know right where to go.
6th, remember that if you don't have the latest version of the Vest (www.thevest.com) you will need a transformer, and not just a little plug that converts the shape of your plug.
7th, check to see if your compressor works overseas. I have a PARI ProNeb ultra, and it doesn't. I found that out the hard way in Austria this past winter, and I was stuck with a $300 European version. Cash.
8th, find a way to boil/sanitize your nebs. I brought a deep flyer with me (it heats water to boiling point). It takes up a ton of space, but when it comes to our health, who cares? last thing I want is to pay for an expensive trip to Europe and then have an expensive hospital bill + time off from work. Staying healthy will make your trip more enjoyable.
9th, carry all of your meds on with you on the plane. ALL OF THEM. Your nebs. Your compressor. Your Vest. Everything. My stuff was hung up in SFO while I was in Austria for 3 days. And the wonderful thing was there was nothing to stress about because I had all of my meds with me. So I could enjoy myself for those 3 days, doing meds, staying healthy, etc. Don't let the airlines tell you that you're carrying too much on. Federal Law requires medical equipment to be carried on the plane.
10th, eat some prosciuto & melone for me in Italy.
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ENJOY YOUR TRIP!!!!!!</b>