In general, the shingles vaccine remains reliably protective for up to 4 years after vaccination.
In most people, the body is able to form stable antibodies over a period of time after shingles vaccination, resulting in a long-lasting immune response. The injection of the vaccine is effective in preventing shingles virus infection and reducing the symptoms of infection, and can be effective in preventing the virus from becoming reactivated for 4 to 5 years.
Therefore, 4 years after the injection of shingles vaccine, you can go to the hospital for relevant examinations to determine whether you need to be vaccinated again with shingles vaccine.
Herpes zoster is a skin disease with severe neuralgia caused by varicella-zoster virus infection.
Some children are infected by the virus and develop chickenpox, and some of them are infected with the virus lurking in the neurons of the posterior roots of their spinal cord. When the host resistance is low, the virus is activated and waits for the opportunity to multiply, and travels up the nerves to the skin, forming a rash that is distributed according to the nerve segments and is intensely painful.