sisay tarekegn, Hailu; assefa, Nega Major Advisor (PhD); demean, Melake Co Advisor Mr.
(Haramaya university, 2018-06)
Vaccination averts an estimated 2 to 3 million deaths every year caused by diphtheria, tetanus,
pertussis (whooping cough), and measles, which accounts 29% from the total of under-five
mortality. To the knowledge of the ...