Third-generation vaccines contain only the antigens of the influenza virus and provide even fewer side effects.
Prepare sleighs in summer?
Right time for vaccinations – for a month and a half before the season started the epidemic in our climate – before winter. However, at the beginning of the epidemic is not too late to be grafted. Immunologists say that the protective level of influenza “fast” antibodies produced in five to ten days after vaccination and the epidemic lasts, usually six to eight weeks, and at its “tail” of the complications occur more frequently.
Misfire:
Sometimes the flu become ill and those who are vaccinated have done. Vaccination reduces the incidence by 80% and not 100%. A person can get, because met with another strain of the virus, because vaccine due to improper storage was poor, because vaccination was done wrong … But the disease is milder than the unvaccinated.
Our reference:
For the first time a vaccine against influenza has been established in 50 of the last century. She was “alive” – a bit weakened virus, “accustomed” to multiply at 25 ° C. In order to obtain immunity against the flu, people should have had them in the mild form, exposing surrounding the risk of infection.
Later developed a vaccine with a “killed” virus. Vaccinated people it does not pose a threat to others.
Vaccines are the second generation was a “dead” and “cut to pieces” virus. The vaccine has rarely causes adverse reactions.
Third-generation vaccines contain only the antigens of the influenza virus and provide even fewer adverse reactions. It would seem that where it’s better? But were created by the vaccine and the fourth generation – cubedinichnye adjuvant. They provide good immunity and practically does not cause side effects.
Forecast:
Influenza viruses are very volatile, so the World Health Organization has established a network of laboratories, where scientists are studying their styles and make predictions, some strain will circulate in the near future. Forecast is forecast discrepancies occur. However, even with the erroneous prediction of the vaccine “works”, although with lower efficiency. Different strains of influenza virus have a number of common antigens, so that a vaccine from one strain is capable of some degree of protection from others.
This year, about WHO projects in Russia and Europe will “host” are two types of influenza A virus (H1N1) and (H3N2) and one B. And they can both complement each other and act independently.
Double protection:
Flu shots reduce the morbidity and other respiratory viral infections. Here are a few explanations. First, many viruses in this group cause disease only in combination with the flu, not influenza – and these infections can not cause disease. There is another assumption – inoculation causes increased allocation in the body of protective proteins – interferon, which prevents reproduction and other viruses.
Elderly and children
Refusing flu vaccination, you 4 times increases the likelihood of ill this serious illness and get after it a complication. Sometimes patients refuse the vaccination-books, they are afraid of exacerbations. But doctors are already convinced that you can vaccinate everybody.
It is especially important to instill young children and the elderly, as well as diabetes, asthma, people with chronic lung, kidney, heart processes … Chronic diseases weaken the immune system and make it vulnerable to viruses. Another thing is that vaccination is deferred until the completion of acute illness or exacerbation of chronic.
A vaccine is contraindicated only for those who give a violent shock reaction to egg white (the vaccine is prepared in the tissues of chick embryos), or have had complications after influenza vaccination.
