المساعد الشخصي الرقمي

مشاهدة النسخة كاملة : Cheap vaccines prevent cholera


BECKHAM
09-07-2015, 07:10 AM
A cheap oral vaccine has prevented cases of deadly cholera in a huge trial in Bangladesh.

for more .... (http://www.bbc.co.uk/news/health-33442821#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa)