As a matter of fact, my studies of deaths from vaccination for many years past show that meningitis and pneumonia are some of the most frequent complications; and these two diseases seem to have a certain relation to vaccination and seem to be very fatal where vaccination precedes them, and thus acts in what is called a “double” or “mixed infection,” which is known to be very dangerous to health and life. See Osler’s “Modern Medicine,” 1913, Vol. I, pages 32 and 33. See also Osler’s “Principles and Practice of Medicine,” 8th edition, 1918, page 330, on the “Influence of Vaccination on Other Diseases.” See also pages 135 and 139 in the Supplement. Another most significant fact in this connection is the high death-rate from disease in the Army, as compared with the civil population, which I will now consider. On page 18 in the Report of the Secretary of War for 1918 the death rate of the Army in the United States from disease for the year ending August 30, 1918, is given as 6.4; that is, about 6½ deaths for every thousand men in the Army. The age-groups composing the Army are, of course, on the general average, between twenty and forty, inclusive. In the same Report it is admitted that the male civilian death-rate for the same ages as in the Army (twenty to forty) was about 4.7, which is a difference of 1.7 or nearly 2 per 1000 in favor of the civil population or civilian males! This civil death-rate is thus, actually and relatively, much lower than the army death-rate, and this fact is very significant as positively indicating some serious cause at work to lower greatly the vitality and resistance and increase the death-rate in the army! Now what is that cause?