After the New Crown vaccination, the body’s immune system has mainly T lymphocytes and B lymphocytes in action, mainly to recognize, trigger immune memory and produce resistance to viruses or bacteria. When we receive the vaccine, an immune memory is formed, and this immune memory will rapidly produce antibodies when it encounters the same pathogen, which will eliminate the pathogen and prevent the disease. From the published literature on the new inactivated crown vaccine, the time of action is mainly two weeks after the second dose of vaccination. Content source: Dr. Yurai