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African Epidemics
One of the earliest records of what may have been an encounter with smallpox in Africa is associated with the elephant war in 568 AD when after fighting a siege in Mecca, Ethiopian troops contracted the disease which they carried with them back to Africa. Arab ports in Coastal towns in Africa likely contributed to the importation of smallpox into Africa, as early as the 13th century, though no records exist until the 16th century. Upon invasion of these towns by tribes in the interior of Africa, a severe epidemic affected all African inhabitants while leaving the Portuguese spared. Densely populated areas of Africa connected to the Mediterranean, Nubia and Ethiopia by caravan route likely were affected by smallpox since the 11th century, though written records do not appear until the introduction of the slave trade in the 16th century. The slave trade continued to spread smallpox to the entire continent, with raiders pushing farther inland along caravan routes in search of slaves. The effects of smallpox could be seen along caravan routes, and those who were not affected along the routes were still likely to become infected either waiting to board or on board ships. Smallpox in Angola was likely introduced shortly after Portuguese settlement of the area in 1484. The 1864 epidemic killed 25 000 inhabitants, one third of the total population in that same area. In 1713, an outbreak occurred in South Africa after a ship from India docked at Cape Town, bringing infected laundry ashore. Many of the white population suffered, and whole clans of the Hottentot tribe were wiped out. A second outbreak occurred in 1755, again affecting both the white population and the Hottentots. The Hottentots spread the disease further among their tribes, and completely eradicating several tribes, all the way to the Kalahari desert. A third outbreak in 1767 similarly affected the Hottentots and Bantu tribes, but the whites settlers, having practiced variolation, were not affected nearly to the extent that they were in the first two outbreaks. Continued slaving operations brought smallpox to Cape Town again in 1840, taking the lives of 2500 people, and then to Uganda in the 1940s. It is estimated that up to eighy percent of the Griqua tribe was exterminated by smallpox in 1831, and whole tribes were being wiped out in Kenya up until 1899. Along the Zaire river river basin were areas where no one survived the epidemics, leaving the land devoid of human life. In ethiopia and the Sudan, Six epidemics occured in over the 19th century as follows: 1811-1813, 1838-1839, 1865-1866, 1878-1879, 1885-1887, and 1889-1890.

Asia
The practice of variolation (also known as inoculation)first came out of the orient. First writings documenting variolation in China appear around 1500. Scabs from smallpox victims who had the disease in its mild form would be selected, and the powder was kept close to body temperature by means of keeping it close to the chest, killing the majority of the virus and resulting in a more mind case of smallpox. Scabs were generally used when a month old, but could be used quicker in hot weather (15-20 days), and slower in winter (50 days). The process was carried out by taking eight smallpox scabs and crushing them in a mortar with two grains of Uvularia grandiflora in a mortar. The powder was administered nasally through a silver tube that was curved at its point, through the right nostril for boys and the left nostril for girls. A week after the procedure, those variolated would start to produce symptoms of smallpox, and recovery was guaranteed. In India, where the European colonizers came across variolation in the 17th century, a large, sharp needle was dipped into the pus collected from mature smallpox sores. Several punctures with this needle were made either below the deltoid muscle or in the forehead, and then were covered with a paste made from boiled rice. Variolation spread further from India to other countries in south west Asia, and then to the Balkans.

Mary Wortley Montagu
In 1713, Mary Wortley Montagu's brother died of smallpox; she too contracted the virus two years later at the age of twenty-six, leaving her badly scarred. When her husband was made ambassador to Turkey, she accompanied him to Constantinople. It was here that Montagu first came upon variolation. Two Greek women made it their business to engraft people with pox that left them un-scarred and unable to catch the pox again. In a letter, she wrote that she intended to have her own son undergo the process and would try to bring variolation into fashion in England. Her son underwent the procedure, which performed by Dr. Charles Maitland, and survived with no ill effects. When an epidemic broke out in London following her return, Mary Wortley Montagu wanted to protect her daughter from the virus by having her variolated as well. Maitland performed the procedure, which was a success. The story made it to the newspapers and was a topic for discussion in London salons. Princess Caroline of Wales wanted her children variolated as well but first wanted more validation of the operation. She had both an orphanage and several convicts variolated before she was convinced. When the operation, performed by the King's surgeon, Claude Amyand, and overseen by Maitland, was a success, variolation got the royal seal of approval and the practice became widespread. When the practice of variolation set off local epidemics and caused death in two cases, public reaction was severe. Minister Edmund Massey, in 1772, called variolation dangerous and sinful, saying that people should handle the disease as Job did with his own tribulations, without interfering with God's test for mankind. Lady Mary still worked at promoting variolation but its practice waned until 1743. Robert and Daniel Sutton further revived the practice of variolation in England by advertising their perfect variolation record, maintained by selecting patients who were healthy when variolated and were cared for during the procedure in the Sutton's own hygienic hospital. Other changes that the Suttons made to carrying out the variolation process include reducing and later abolishing the preparatory period before variolation was carried out, making more shallow incisions to distribute the smallpox matter, using smallpox matter collected on the fourth day of the disease, where the pus taken was still clear, and recommending that those inoculated get fresh air during recovery. The introduction of the shallower incision reduced both complications associated with the procedure and the severity of the reaction. The prescription of fresh air caused controvesy about Sutton's method and how effective it was in reality when those inoculated could walk about and spread the disease to those that had never before experienced smallpox. It was the Suttons who introduced the idea of mass variolation of an area when an epidemic broke out as means of protection to the inhabitants in that location.

News of variolation spread to the royal families of Europe. Several royal families had themselves variolated by English physicians claiming to be specialists. Recipients include the family of Louis XV following his own death of smallpox, and Catherine the Great, whose husband had been horribly disfigured by the disease. Catherine the Great was variolated by Thomas Dimsdale, who followed Sutton's method of inoculation. In France, the practice was sanctioned until an epidemic was traced back to an inoculation. After this instance, variolation was banned within city limits. These conditions caused physicians to move just outside the cities and continue to practice variolation in the suburbs.

Edward Jenner
Edward Jenner was variolated in 1756 at age eight in an inoculation barn in Wooton, England. At this time, in preparation for variolation children were bled repeatedly and were given very little to eat and only given a diet drink made to sweeten their blood. This greatly weakened the children before the actual procedure was given. Jenner's own inoculation was administered by a Mr. Holbrow, an apothecary. The procedure involved scratching the arm with the tip of a knife, placing several smallpox scabs in the cuts and then bandaging the arm. After receiving the procedure, the children stayed in the barn for several weeks to recover. First symptoms occurred after one week and usually cleared up three days later. On average, it took a month to fully recover from the encounter with smallpox combined with weakness from the preceding starvation. At the age of thirteen, Jenner was sent to study medicine in Sodbury with Daniel Ludlow, a surgeon and apothecary, from 1762-1770 who had a strong sense of cleanliness which Jenner learned from him. During his apprenticeship, Jenner heard that upon contracting cowpox, the recipient became immune to smallpox for the remainder of their life. However, this theory was dismissed because of several cases proving that the opposite was true. After learning all her could from Ludlow, Jenner apprenticed with John Hunter in London from 1770-1773. Hunter was a correspondent of Ludlow’s, and it is likely that Ludlow recommended Jenner to apprentice with Hunter. Hunter believed in deviating from the accepted treatment and trying new methods if the traditional methods failed. This was considered unconventional medicine for the time period and had a pivotal role in Jenner's development as a scientist. After two years of apprenticeship, Jenner moved back to his hometown of Berkeley, where he quickly gained the respect of both his patients and other medical professionals for his work as a physician. It was during this time that Jenner revisited the connection between cowpox and smallpox. He began investigating dairy farms in the Gloucestershire area looking for cowpox. This research was slow going as Jenner often had to wait months or even years before cases of cowpox would again return to the Gloucestershire area. During his study, he found that cowpox was actually several diseases that were similar in nature but were distinguishable through slight differences, and that not all versions had the capacity to make one immune from smallpox upon contraction. Through his study, he incorrectly deduced that grease, smallpox and cowpox were all the same disease, simply manifesting themselves differently in different animals, eventually setting back his research and making it difficult to publish his findings. Though Jenner had seen cases of people becoming immune to smallpox after having cowpox, too many exceptions of people still contracting smallpox after having had cowpox were arising. Jenner was missing crucial information which he later discovered in 1796. Jenner hypothesized that in order to become immune to smallpox using cowpox, the matter from the cowpox pustules must be administered at maximum potency; else it was too weak to be effective in creating immunity to smallpox. He deduced that cowpox was most likely to transfer immunity from smallpox if administered at the eighth day of the disease. On May 14, 1796, he performed an experiment in which he took pus from a sore of a cowpox infected milkmaid named Sarah Nelmes and applied it to a few small scratches on the arm of an eight year old boy who had never before contracted either smallpox or cowpox, named James Phipps. Phipps recovered as expected. Two months later, Jenner repeated the procedure using matter from smallpox, observing no effect. Phipps became the first person to become immune to smallpox without ever actually having the disease. He was variolated about many more times over the course of his life to prove his immunity. When the next cowpox epidemic broke out in 1798, Jenner conducted a series of inoculations using cowpox, all of them successful except on his own son Robert. Because his findings were revolutionary and lacked in evidence, the Royal Society (of whom Jenner was a member) refused to publish his findings. Jenner then rode to London and had his book published by Sampson Low’s firm in June 1798 The book was an instant bestseller among the elite in London salons, in the medical establishment and among the ladies and gentlemen of the enlightenment. Knowledge of the ability of cowpox to provide immunity from smallpox was present in England before Jenner's discovery. In 1774, a cattle dealer named Benjamin Jesty successfully inoculated his wife and three sons using cowpox. This was before Jenner discovered the immunization capabilities of cowpox. However, Jesty simply performed the procedure; he did not take the discovery any further by inoculating his family with smallpox matter to see if there would be a reaction or perform any other trials. Jenner was the first to prove the effectiveness of vaccination with cowpox using experimentation.

United States of America
Benjamin Franklin, who had lost his own son to smallpox in 1736, made the suggestion to create a pamphlet to distribute to families explaining how to inoculate their children themselves, so as to eliminate cost as the factor in the decision to choose to inoculate children. William Heberden, a friend of Franklin's and an English physician, followed through with Franklin's idea, printing 2000 pamphlets in 1759 which were distributed by Franklin in America. An American physician, John Kirkpatrick, upon his visit to London in 1743, told of an instance where variolation stopped an epidemic in Charleston, South Carolina, in 1738, where 800 people were inoculated and only eight deaths occurred. His account of the success of variolation in Charleston helped to play a role in the revival of its practice in London. Kirkpatrick also advocated inoculating patients with matter from the sores of another inoculated person, instead of using matter from the sore of a smallpox victim, a procedure that Maitland had been using since 1722.

Vaccination
Jenner's discovery of the ability of cowpox to provide immunity from smallpox completely