Actually, she (Maria) is correct. These "viruses" spread fairly quickly from person to person due to people not washing their hands, not covering their mouths when they sneeze/cough, etc. Are there cases due to food contamination because of uncareful workers, of course. But by in large most of the viruses are passed on person to person.
...And that is why if you are going to an AI, you find one where the workers serve the food chosen by the guest behind glass partitions, not one where each guest serves themselves using the same utensils that could potentially pass on any virus or may have fallen to the ground and picked up and reused.
Not that even that method is foolproof, but you do reduce the chances of contracting or passing along a virus.
On the other hand, food contamination, salmonella, etc., no matter what resort, can be prevalent depending upon the resorts food handling and safety protocols. The resorts do not incur outside safety and food handling inspections that might help them identify issues before they become problems.
Perhaps there are others, but the only AI resort that I am aware of that serves guests at the buffet from behind glass partitions is Hyatt Ziva.
Respectfully,
Playacaribe2