Still, it would be a lot of people: 50 to 83% [1], and more importantly, it has to be evenly distributed. It would be pointless to have developed countries safe while the rest of the world is in chaos. We're a global economy after all.
The data scandal was serious and to be honest, needed. It brought data and privacy awareness, countries and even entire continents are now trying to convey regulations on the subject.
Facebook was already superfluous, if you can afford to delete it.
[1] https://en.wikipedia.org/wiki/Herd_immunity#Mechanics