Having visited India several times in my life, I can confidently say that eating a cold dish is a one-way trip to the hospital. It’s because food handling standards in some countries are not quite the same as in developed nations.
Foods to avoid include chilled sauces and desserts. It’s actually a pretty easy tip to follow because most food is made hot and fresh. However, chilled foods are a problem because bacteria is permitted to develop and the food may be several days old.