Does Social Networking harms health?

Does social networking harms health?
From my own opinion, I think it does.

Nowadays, not only teenagers but kids too own a computer or notebook.
In the young age, they learn how to use computer, even how to log in to some websites. Through here you as a reader can see how modern and the world goes.
Without internet connection, we can't really connect with the outside world except through expensive payments.

As i read through an article.
It notes that the face-to-face contact is reducing and this harms our health.
This verse is claimed by an expert and I agree with what the expert says.
For instance, Facebook is expanding and everyone is connecting each other through there. Users even enrich their knowledge and friends through there too. But this is an apart way of contacting each other where there aren't any face-to-face contact.

From the article, you can see how social networking affects our health. There are so many sickness which appear and attack us. What are the sickness?
Heres some which I grab from the article to tell all of you out there a little of it.
"It can alter the way genes work, upset our immune responses, hormone levels, and the function of arteries, and influence mental performance."

This ain't said nor prove by me, but by the experts. Believe it not? Better start to believe it. Try to read more articles about this issue, it helps you out there to understand more.
But do you agree with this issue? Does social networking issue harms health?

Reference: Thirdage, "Does Social Networking harms health?" Retrieved 27 February 2009
URL: http://www.thirdage.com/long-life-tips/social-networking-harms-health

-Rachel-