Smallpox vaccine, made from a different virus, has risks that are difficult to quantify for today's population.
Definitions of overweight and obesity are more difficult to quantify for children, whose BMI changes with age.
"We know that illegal immigrants are a factor," said Norman Goldstein, a senior financial executive at Social Security, "but I cannot quantify for you how that factor compares with other factors".
Spatial variation of available food resources can be difficult to accurately quantify for wide ranging organisms at landscape scales.
Regulation is a tough issue to quantify; for some businesses, it is the arbitrary nature of changes in the regime that is the problem.
Among the things he would quantify, for instance, was the length of time patrons might stand in line to board an amusement park ride.
The new figures quantify for the first time the extent of provision by independent food banks in Scotland, an exercise that has yet to be conducted in England and Wales.
Specialized plant fungal interactions are notoriously hard to quantify for the whole plant community, but molecular techniques can help assess whether specialization between hosts and enemies changes near forest edges17,27.
Herein, we sought to isolate and quantify, for the first time, the selectivity benefits of MPc modification of glassy carbon electrodes.
These results quantify for the first time the significance of wind action in the erosion of peat in a UK upland environment.
The seagrass coverage maps provided here describe and quantify for the first time the extent and the spatial distribution of seagrass meadows in Greek waters.
