In both cities and rural areas of Tanzania, babies from the poorest families are more likely to be late or miss their vaccines than babies from the richest families.

In rural Tanzania, babies born at home are more likely to be late or miss their vaccines than babies born in hospitals or clinics.

In rural Tanzania, babies who are the fifth or later child in their family are more likely to be late on their vaccines than the first child.

In rural Tanzania, babies born small are actually less likely to miss their vaccines than babies born at a normal weight — the opposite of what’s seen in most other poor countries.

In both cities and rural areas of Tanzania, teenage moms are much more likely to have babies who miss or are late on their vaccines than moms in their mid-20s.

In rural Tanzania, moms with no school are much more likely to have babies who miss vaccines — but in cities, whether a mom went to school doesn’t seem to affect vaccine timing.