1. A post can go viral outside of your network if enough of your friends share it.

2. The last thing she needed was a viral picture of herself enjoying a night out at a bar.

3. When the viral story first broke out over the weekend, it seemed too good to be true.

4. In a Facebook post, Zuckerberg said the viral outbreak is at a critical turning point.

5. The video went viral in the IT community.

6. On the other hand, negative views can quickly go viral and cause damage.

7. There is no evidence yet that a spate of viral videos like the United one have hurt ticket sales.

8. That phrase has since gone viral on social media.

9. The post went viral and Brady ended up sending him a signed pair.

10. You ride the viral wave, then wait for people to get bored and forget about it.

11. In many cases, those videos go viral and millions view interesting creations and experiences.

12. The fundraiser went viral and raised tens of millions of dollars for the cause.

13. The viral strains sort exactly as you would predict based on sequencing of human genomes.

14. When it comes to viral content, the more ridiculous, the better.

15. The quest for viral fame has a cost.