Vaccine

Vaccines

Vaccination or immunization is a method of inducing protection against a particular infectious disease by supply of vaccine (containing antigen), that is, a preparation which activate the body’s immune system against the causative factor, suchvaccine as bacteria, viruses or parasites. Contents [hide] 1 History 2 Variants 3 Objectives of vaccination 4 Vaccination 5 Degree of protection and immunity length 6 See also 7 References 8 External links History [edit | edit source] In China it was known already in the 1000’s that the one who had received the smallpox was immune from the disease – the condition that the person survived. It used actively infecting children with a low dose, so that they either died instantly or survived and were immune. The technology used in Asia and called Variolation or grafting, and is a precursor to vaccination. This way of inducing immunity began to be practiced on a small scale in Europe and in North America in 1700 talet.Variolisation was far from risk-free but was nevertheless much safer than getting smallpox. In 1796 May 14 succeeded the English physician Edward Jenner cultivate a vaccine against smallpox that almost eradicated the disease in Europe. Jenner had noticed that the women who milked cows had beautiful skin (smallpox in turn left the unsightly dimples in the skin of those who survived) and not suffered from smallpox. Folkvisdomen claimed that those who had cowpox did not get smallpox, which brought Jenners interest. Cowpox do not have the human host – they cause only a brief subcutaneous infection. However kokoppsviruset is closely related to the smallpox virus, and they share some antigens, allowing kokoppsinfektion provides immunity to both the vaccinia and smallpox. Jenner’s vaccine was based on kokoppsviruset and he created the word “vaccination” from the Latin word for cowpox vaccine (Lat. Vacca, en. Cow).

The real reason

Objectives of vaccination [edit | edit source] The goal of vaccination is to protect the population from severe diseases. The diseases that we now immunize children against the disease before both were instantly fatal and resulted in severe life-long problems. In a population needs many, 75% -90% of all individuals to be vaccinated for the disease should no longer hold. The proportion who need to be immune depends on how contagious the disease is. If a small proportion is vaccinated, the disease will be able to exist and spread in the population and can infect newborns before they are vaccinated. A good vaccination program which includes as many as possible favors Thus even those who are not vaccinated, the disease does not have a foothold in the environment and can therefore not exposed to contamination. Vaccination [edit | edit source] To reach a higher proportion of a population can implement a vaccination. In Sweden, many children are vaccinated through the national vaccination program. Degree of protection and immunity length [Edit | edit source] Both the protections (in percent) of immunity varies from vaccine to vaccine. In many cases, screening illness a lifelong immunity against that particular serotype, but not against others. Vaccine immunity can, however, protect against multiple serotypes. The information in the table below is taken from: [2] [3] [4] [5]