What is the typhoid fever risk for an un-vaccinated toddler in Mexico City? [closed]

We're planning a 12 month trip to Mexico and Central America, and my daughter will be 20 months old at the time. The minimum recommended age for the Typhoid Fever vaccine is 24 months.

I consulted a travel vaccination specialist in Sydney, Australia but she had no direct experience with Mexico, and could only refer to a generic map which puts the entire region of Mexico, Central America and South America as a high-risk category:

The CDC Typhoid page says:

travelers to the developing world should consider taking precautions. Travelers to ... Latin America are especially at risk

and specifically for Mexico:

You can get typhoid through contaminated food or water in Mexico. CDC recommends this vaccine for most travelers, especially if you are staying with friends or relatives, visiting smaller cities or rural areas, or if you are an adventurous eater.

They mention that smaller cities pose a greater risk, presumably because they have poorer sanitation.

Would we reduce the risk of typhoid for our toddler if we stayed in a large, modern city such as Mexico City until she was old enough for the typhoid fever vaccine? Or is the typhoid risk too great for the entirety of Latin America, as implied in the first quote above?