Such organisations should make an extra effort to find some of the most shared posts promoting untrue rumour and comment there too, the study showed.
When people can see that a credible source has debunked the rumour, they would start taking such stories with a grain of salt.
The sheer convenience of sharing stories make social networking websites vulnerable to being a potential platform for spreading rumours.
The researchers, however, found that true rumours spread faster than false rumours on Facebook.
While true rumours get on average 163 shares per post, false rumours get an average of 108 shares per upload.
What should make public bodies even more concerned was the findings that a dormant rumour can resurface even after weeks and months.
For the study, the researchers tracked thousands of rumours through a website documenting urban legends and examined how they spread on Facebook.
"Sometimes the rumours die down on their own, but in one particular case of a rumour claiming that Facebook would start charging a fee, we observed the rumour being dwarfed by an antidote more powerful than the truth: humour," the study concludes on a lighter note.
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