Yawning is extremely contagious -- 55% of people who witness someone yawn will yawn within five minutes. If...one of these gaping maws is unlikely. Although the contagious nature of yawning is well established, we know less about why...
1 Answers · Science & Mathematics · 14/02/2010
You can become contagious as early as 7 weeks before you come down with symptoms. More... this doesn't mean that if you've had mono you are always contagious . Over time, the virus becomes less contagious . Eventually, it...
3 Answers · Health · 01/12/2008
- related to: Contagious
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