The 4-valent influenza vaccine is the quadrivalent influenza vaccine, which has the effect of preventing influenza and allows the body to recognize and develop immunity against the relevant influenza viruses, thus achieving the effect of suppressing and clearing the influenza viruses.
Quadrivalent influenza vaccine belongs to Class II vaccine in China. This biological preparation can prevent influenza caused by two influenza A virus subtypes and two influenza B virus subtypes. After vaccination, the body can quickly develop an immune response to the corresponding influenza viruses within a period of time, preventing the body from suffering from some serious complications due to influenza.
Adverse reactions: The overall safety of quadrivalent influenza vaccine is relatively good, but vaccination may cause some adverse reactions, such as local pain, redness, swelling, itching and fever, etc., which are usually temporary and relatively mild.
Contraindications: The quadrivalent influenza vaccine is contraindicated in people who are allergic to any of the components of the vaccine, people who suffer from acute illnesses, people with severe chronic illnesses, uncontrolled epilepsy or other progressive neurological diseases.
Precautions: Individuals should stay for thirty minutes after vaccination and leave when they are not feeling unwell. In addition, after vaccination, one should pay attention to a light diet and a combination of work and rest, and consult a doctor promptly if any serious adverse reaction occurs.
During the influenza season, children and the elderly are recommended to receive the quadrivalent influenza vaccine.