You have higher chances of getting sick in big restaurants, where raw materials are kept in refrigerators, whereas on the street, those are fresh!
The struggle against dust is omnipresent though. In this way, when in street restaurants, always think about cleaning your bowls, glasses, chopsticks as well as the top of bottles and cans with a tissue before intake…this practice would be unthinkable in Western countries, but here it is more than common.