Use one trusted source for all travel-related health information, including vaccines you may need: https://www.nc.cdc.gov/travel
Other tips: Wash your hands often, travel with hand sanitizer and wipes, pack more than enough of your prescription medication (you may want to carry an extra scrip on you as well), get your annual flu vaccine, drink bottled water/stay hydrated.
Avoid international fees by using a travel credit card that waives them.
Get a duplicate of your ATM card to travel with.
Take out foreign currency once in destination using a bank ATM, avoid airport currency exchanges and never take out a cash advance on your credit card.
Carry emergency fund cash on you at all times.
Leave all of your valuables at home (including the engagement rings).
Common Sense: The best advice that we could give any traveler today is to use plain old common sense. Be smart, be aware of your surroundings at all times and be prepared. Lock all doors and don’t go out alone at night (even on the beach).
