Gavi's global immunisation programme includes plans to roll out new vaccines against major causes of pneumonia and diarrhoea, two of the biggest child killers.
Since she reportedly never contracted chicken pox as a child, she was at higher risk for developing severe symptoms and complications including pneumonia.
Ms Bellamy said 60% of child deaths in Pakistan could be avoided by focusing on a limited number of treatable diseases like diarrhoea, pneumonia and neonatal infections.