[unable to retrieve full-text content]In the beginning, all flu viruses came from birds. Over time, the virus evolved to adapt to other animals, including humans, as natural selection favored viruses with mutations that allowed them to more readily infect the cells of new host species.Source: http://www.eurekalert.org/pub_releases/2013-10/uow-hbf102113.php
Similar Articles: US News college rankings Miley Cyrus Wrecking Ball
এতে সদস্যতা:
মন্তব্যগুলি পোস্ট করুন (Atom)
কোন মন্তব্য নেই:
একটি মন্তব্য পোস্ট করুন