It reflected the fact that these decades saw a climb in general standards ofliving and avoidance of mass societal traumas like full-scale war or economic deprivation.
This impressive chart assembled by the web-based science "comic" XKCD shows how doses scale up in sieverts, the units by which absorption of radiation into living tissue is measured.
Implemented at a wide scale, WHO's new recommendations will improve the health of people living with HIV, reduce the number of new HIV infections and save lives.