* CHC = combination hormonal contraception ** Pregnancy data based on actual duration of pregnancy in the reference studies. (nuvaring.com)
However, in later works he begins to speculate about the actual durations of higher grade occasions and suggests that human conscious occasions have a duration of some tenths of a second. (religion-online.org)
Although public health officials have assumed that measles immunity lasts forever, the case of Measles Mary highlights the reality that «the actual duration [of immunity] following infection or vaccination is unclear,» says Jennifer Rosen, who led the investigation as director of epidemiology and surveillance at the New York City Bureau of Immunization. (sciencemag.org)