The Origin of vaccines

Did you know that … the word VACCINE is derived from the word “cow” because milk collectors who were in contact with sick cows immunized them against smallpox disease?

It happened in 1796 during one of the bloodiest periods of smallpox. The English physician Edward Jenner observed that women in charge of milking sick cows did not develop the smallpox disease. So Jenner decided to inoculate a boy named James Phipps who had also been in contact with milking cows of these farmers. The boy suffered for 48 hours the symptoms of cowpox, but when they injected it, the human smallpox virus does not show any symptoms or illness suffered.

Vaccines are currently presented as effective tools to prevent diseases that have caused pandemics formerly and now thanks to them are eradicated or in process of being.
The vaccine is an artificial way to stimulate the immune system to manufacture defenses against infectious agents, by the oral or injectable administration of viral or bacterial proteins, called antigens, which can be obtained from the microorganisms themselves or genetically engineered.

In administering these antigens, the immune system reacts as if in the presence of the disease and develops antibodies against it. Thus a vaccinated person acquires protection against the disease without having suffered.
For the immune response to function fully, the vaccine should be placed in time, before the natural exposure to the organism of the person occur.
It is very strange that an extremely adverse reaction to administer a vaccine becomes available. The most common symptoms are mild reactions such as itching or swelling in the area where the vaccine has been administered or fever and some discomfort, being much greater benefits than the administration of the vaccine can bring side effects it may cause.
Most vaccines are usually administered during childhood and adolescence. Currently in Spain each region has established its own vaccination schedule
It is also advisable to do when you go on a journey to a foreign country where they have not eradicated certain communicable diseases.