25 years after Vi typhoid vaccine efficacy study, typhoid affects significant number of population in Nepal.
Bajracharya D, Khan MI, Pach A, Shrestha P, Joshi N, Upreti SR, Wierzba T, Puri M, Sahastrabuddhe S, Ochiai RL. 25 years after Vi typhoid vaccine efficacy study, typhoid affects significant number of population in Nepal. PLoS One. 2014; 9(1):e77974.