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Period: Jan 1, 1510 to Jan 1, 1580
Giovanni Filippo
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Richard Morton
LinkHe discovered that there is a difference between Smallpox and Chickenpox. Smallpox is more deadly. -
William Heberden
LinkThis English doctor, started realizing two important things. First, he started research showing that chickenpox is different from the more deadly disease smallpox. Second, he started showing that once a person has had chickenpox, that person usually never gets it again. -
William Heberden Finishes Research
Link He detected the difference between smallpox and chickenpox, stating how the former “mild and unimportant disease” chickenpox should be taken off the same ladder as smallpox He also stressed that the person who has had chickenpox in the past will remain immune from future attacks by varicella. -
Rudolf Steiner
LinkRudolf Steiner discovered that chickenpox was caused by an infectious agent.He took fluid from the chickenpox blisters of an infected person and rubbed it on the skin healthy volunteers. They too developed the itchy, bumpy rash -
Chickenpox vs. Smallpox
LinkChicken pox is a human disease. This disease causes the skin to break out in red bump In the early 1900s, scientists realized chicken pox comes from a virus that causes fevers and blisters, whereas the smallpox virus causes mono. -
Von Bokay findings
LinkVon Bokay, in 1909, said that the shingles virus and chickenpox were related. -
Period: to
Von Bokay's Research Findings found...
YouTube Video- Varicella VaccineLink 2Link 1Von Bokay’s idea that the two infections, shingles and chickenpox, were related was proved true by tests that took fluid from shingles was put on children and shown to give them chickenpox. During this time, parents would intentionally expose their children to chickenpox in order for them to build up antibodies to the infection; but to their knowledge they were just exposing the children to the inevitable to get it over with as soon as possible -
Takahashi Made the First Vaccine
LinkTakahashi developed a live, less violent form of VZV (varicella-zoster virus) vaccine for prevention of varicella. -
First Use of Vaccine
This was the first year that they used VZV vaccine in Japan -
Varicella Reaches High Infection Rate in the US
LinkIn this year, he highest rate of varicella was reported in preschool-aged children. -
High Rate of Varicella
LinkData from 1992 showed that about 158,000 cases of chickenpox were reported and 100 deaths were reported. -
Vaccine Reaches U.S.
First Chicken Pox vaccine in the United States -
Period: to
Varicella in U.S. after Vaccine
Link“March 1995 and July 1998, the federal Vaccine Adverse Events Reporting System (VAERS) received 6, 574 reports of health problems after chickenpox vaccination. That translates into 67.5 adverse events per 100,000 doses of vaccine or one in 1,481 vaccinations. About four percent of cases (about 1 in 33,000 doses) were serious including shock, encephalitis, thrombocytopenia (blood disorder) and 14 deaths.” -
Vaccine Effectiveness in the U.S.
LinkThe CDC reported in Dec of 2002 that “the effectiveness of the vaccine was 44 percent against disease of any severity and 86 percent against moderate or severe disease." This was when some researchers and doctors proposed a second dose of the vaccine may be needed. -
Adult Data
“Another study in 2002 confirmed that adults exposed to natural chickenpox disease were protected from developing shingles and that there is concern that mass vaccination against chickenpox may cause a future epidemic of shingles, affecting more than 50 percent of Americans aged 10 to 44 years.”
