This week saw remarkable progress in child health since 1990 was explored,showing that deaths had almost halved in the 25 years since.
Immunisation in India was praised for a promising start to 2017, introducing new vaccines to protect against measles, rubella and others major diseases.
The challenges of preventing disease for vulnerable people in Nigeria was also highlighted, as measles threatens.
Two new studies came out this week, affirming the power of vaccines. One showed that whooping cough vaccines for pregnant women could protect newborns and that flu vaccines could also reduce child deaths.
And after a few years of developing Ebola vaccines, a new trial is about to startto find out how well different candidates and strategies work to protect people on the ground.