From year to year history inevitably returns us to the point where the end of autumn begin to appear the first people suffering from influenza. Then everything becomes like an avalanche, the number of cases grows exponentially progression. Therefore, such phenomena as the flu shot is becoming more and more popular among the people. However, society has split into two categories: the first completely "for" universal vaccination, while others find it more harmful than the probability of disease. COVID-19 pandemic recognizes the significance of this. Sometimes the body responds quite clearly to the vaccine in humans may have a fever, may be feeling a few days prostration and malaise. But these inconveniences simply fade before any trouble entails the flu itself, the disease in its various manifestations and can fairly pull the body, reducing its strength and endurance to a minimum. In addition, it causes aggravation chronic human diseases, often due to this unfavorable combination of having undesirable complications that can lead to the most pitiable result. Better not to risk, and instill in advance, this the most effective way to combat influenza..