The point is that only some healthy controls are free from disease and many have the same amount of disease as the diseased cases.
In his decision, rendered in February 1855, the judge declared that "colored persons, if sober, well behaved, and free from disease, had the same rights as others".
It is becoming clear that biochemical interventions that preserve the mental functioning of people free from disease are on the horizon.
But after initial amazement, the focus has now turned to the difficult task of keeping the group safe and free from disease, as well as trying to understand why they were driven to cross the threshold into modern society – a step that has often proved fatal in the past.
He is not just a chronicler of wonders; he is a wonderer, puzzling for two pages as to why the overall Dyak population is so small, among a people who produce "far more food than they consume", who appear to be "very free from disease" and who marry early "but not too early".
According to Edmund Penning-Rowsell, the great English authority on Bordeaux wines, the problems of the 1940-44 period "were largely those of shortage of manpower to look after the vineyards and of chemicals to keep the vines free from disease".
Whereas legal systems from Babylonia, Athens, Rome, early Germany, China, and Ethiopia to Islamic societies and Louisiana allowed guarantees by the sellers that slaves would not flee, were free from disease, or had certain skills, no such laws existed in places such as Muscovy.
In the 16th century the system was extended by the introduction of bills of health, a form of certification that the last port of call was free from disease; a clean bill, with the visa of the consul of the country of arrival, entitled the ship to free pratique (use of the port) without quarantine.
Ten patients remained free from disease till final follow-up.
At the study end, half of the animals in each group given 211At-BR96 and one animal in the control group were free from disease.
In this case, for any given initial value ( S 0, I 0, R 0 ) with I 0 > 0, the state ( S n, I n, R n ) will finally tend to ( N, 0, 0 ), namely, the final situation of epidemic is free from disease.
