logistic regression: outcome does not vary

My research topic is about child mortality and risk factors, including education, age, child with full vaccination or not and so on.
so my outcome is child mortality, where 0 means alive and 1 means death.
All risk factors (variables) are dummy variables.
My problem is that i tried to do logistic regression as below:
logit child_mortality ib1.gender ib1.wealth ib1.ch_fullvaccine, or
but the results showed outcome does not vary.
To figure out, i tried to do single regression first:
logit child_mortality ib1.gender,or
All results are fine except the variable ch_fullvaccine. the results indicated outcome does not vary.
May i know how to deal with it?