3. Total number of persons inoculated No inoculations 3,091 One inoculation 232 Two inoculations 249 Three inoculations 479 Four inoculations 1,210 —————— Total 2,170 4. Cases influenza developed after No inoculations 705 55% One inoculation 111 48% Two inoculations 91 36% Three inoculations 129 27% Four inoculations 239 19% —————— Total 1,275 5. Cases influenza pneumonia 40% developed after No inoculations 283 of (4 One inoculation 75 67% Two inoculations 59 64% Three inoculations 51 42% Four inoculations 69 28% —————— Total 537 6. Deaths from influenza and “flu 5.6% Pneumonia” after No inoculations 40 of (4 One inoculation 5 4.5% Two inoculations 0 Three inoculations 0 Four inoculations 3 4.3% —————— Total 48 Charts I and III show a decrease in the incidence of influenza in direct proportion to the number of inoculations given. This finding would have been very important had vaccination been completed before the epidemic appeared. There is, however, no convincing evidence in either of these charts that the vaccine cut down the relative number of pneumonias, or decreased the death rate to any appreciable extent. Chart I also shows the interesting fact that influenza occurred slightly more often among those who had one inoculation than among those who were not vaccinated at all. Chart II would indicate that influenza occurred much less frequently in the vaccinated than in the control group, but a closer analysis brings out the contradictory finding that influenza occurred at the same rate in the group of 634 persons who had only 1 dose that it did in the group of 1,271 who completed the course.