How Facebook could stop a disease outbreak How Facebook could stop a disease outbreak. “Facebook accounts and telephone records can be used to pinpoint the best individuals to vaccinate to stop a disease outbreak in its tracks, researchers said Wednesday. Such people would be ‘central’ in their social networks, and thus likelier to spread disease-causing germs from one group to another. Assuming there is an outbreak, and not enough vaccines for every person in the world, immunising these well-connected individuals would remove social ‘bridges’ by which germs can spread, experts wrote in the Journal of the Royal Society Interface.”