Why should I have influenza vaccine even if it is only 30% effective?

byFort George G. Meade Public Affairs Office

Quartz wrote about influenza that is prevalent in winter every year in Japan, but "Why do I have to hit a vaccine with an effective rate of only about 30%?"

The flu vaccine is only about 30% effective but you should get it it anyway - Quartz
https://qz.com/1180874/the-flu-vaccine-is-only-about-30-effective-but-you-should-get-it-anyway/


SeveralNews report, The effectiveness rate of influenza vaccine used in the United States from 2017 to 2018 was predicted to be only 10%. On the other hand,American Disease Control Center(CDC), the effective rate of influenza vaccine in 2018 will be 32 to 39%Predictiondoing.

Thus, it is difficult to accurately predict whether a vaccine is effective against the actually prevalent influenza, but experts need to produce vaccines somewhere before the influenza epidemic there is. And since the influenza virus epidemic changes, insurance organizations have difficulty predicting when influenza will become popular.

In February and September every year, researcher groups around the worldwhoOf the 3 to 4 kinds of influenza that may be prevalent in the northern hemisphere and the southern hemisphere in the next winterVirus strainForecast.

byDrew Hays

Regarding such an influenza vaccine, health authorities admit that the effectiveness rate is inadequate, but the best way to protect people is "to vaccinate as many people as possible". This is because scientists say "The power of mass immunityIt is said to lead to raising what we call.

If you increase the power of group immunity, people living in society will be less likely to be affected by viruses and diseases, which in turn reduces the chances of people living on the part of the disease, that is, It can reduce onset. If so, the likelihood that weak people with immune system, such as the elderly, infants, chronically suffering from diseases, suffer from serious diseases such as life and death will decrease, not only the incidence rate will decrease but also the deceased It surely contributes to the reduction of the number.

The figure below shows the effect of "the power of collective immunity". A blue person is a healthy person who is not vaccinated, a yellow one is a healthy person who has been vaccinated, and a red color is a person who has developed a disease not vaccinated, and the person vaccinated You can understand well that you can stop the spread of diseases if it is many.

By Tkarcher (Own work) [CC BY-SA 4.0],via Wikimedia Commons