Smallpox vaccine get to a populated place. The world health system is completely unprepared for this." In the United Kingdom, controversy occurred regarding the company which had been contracted to supply the vaccine. This was because of the political connections of its owner, Paul Drayson, and questions over the choice of vaccine strain. The strain was different from that used in the United States. Plans for mass vaccinations in the United States stalled as the necessity of the inoculation came into question. Smallpox vaccine Smallpox vaccine, the first successful vaccine to be developed, was introduced by Edward Jenner in 1796. He followed
Rhine Campaign of 1796 Germany. By the spring of 1796, Jourdan and Moreau each had 70,000 men while Bonaparte's army numbered 63,000, including reserves and garrisons. François Christophe de Kellermann also counted 20,000 troops in the Army of the Alps holding the area between Moreau and Bonaparte on the western side of modern Switzerland; there was a smaller army in southern France that played no role in the Rhine Campaign. According to plan, Kléber made the first move, advancing south from Düsseldorf against Württemberg's wing of the Army of the Lower Rhine. On 1 June 1796, a division of Kléber's troops led by François