ahlam1399
06-22-2016, 10:41 PM
Older siblings can be an**ying k**w-it-alls, but research suggests they may also help younger siblings build up stronger immune systems. And that may help reduce the risk of asthma and allergies.
أكثر... (http://www.npr.org/sections/health-shots/2016/06/22/482998036/asthma-free-with-**-hay-fever-thank-your-older-sibling?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/sections/health-shots/2016/06/22/482998036/asthma-free-with-**-hay-fever-thank-your-older-sibling?utm_medium=RSS&utm_campaign=news)