"One third of the world's population is infected."
Wild claims like this are sure to decrease the credibility of an article which otherwise sounds very legitimate alarms and concerns.
1/3 of the world's population probably has inactive, latent TB. It can reactivate in stress, old age, or if you become immunocompromised or it may not reactivate at all.
A lot less have active TB, which is making them sick right now.