Vitamin A supplementation for preventing morbidity and mortality in children from 6 months to 5 years of age.  Imdad A 2017 [33]  Children42 RCTs  Vitamin A (large-dose trials: range of 50,000 UI to 200,000 UI, except for five studies: 3866 UI 3 times a week, 8333 UI once a week, 10,000 UI weekly and 250,000 UI 2 times a week)  12% reduction in all-cause mortality (RR 0.88 95% CI 0.83 to 0.93) in the interevention group.Not significant difference in ALRI-mortality.Not effect for vitamin A supplementation on ALRI incidence (only 2 trials reported ALRI prevalence, suggesting benefit for vitamin A supplementation).