Food to avoid while having cough

Recently, my wife kept on having cough. I guess, it must be the weather. Anyway, here's a list of food that she needs to avoid:

• Egg
• Chicken
• Orange
• Grapes
  
• Banana
• Papaya

I think when you have cough, you need to avoid all citrus fruits and chicken. And of course, those cold, oily and chili food as well.