Childhood asthma risk affected by bacteria in early infancy

Children gain protection against asthma if exposed to four types of gut bacteria by the age of three months, as their immune system is being established. Click here for the full story: http://www.cbc.ca/1.3250510 »»» Subscribe to The National to watch more videos here: https://www.youtube.com/user/CBCTheNa... Voice Your Opinion & Connect With Us Online: The National Updates on Facebook:   / thenational   The National Updates on Twitter:   / cbcthenational   The National Updates on Google+: https://plus.google.com/+CBCTheNational »»» »»» »»» »»» »»» The National is CBC Television's flagship news program. Airing seven days a week, the show delivers news, feature documentaries and analysis from some of Canada's leading journalists.