Abstract Background After the eradication of smallpox in China in 1979. vaccination with the vaccinia virus (VACV) Tiantan strain for the general population was stopped in 1980. As the monkeypox virus (MPXV) is rapidly spreading in the world. we would like to investigate whether the individuals with historic VACV Tiantan strain vaccination. https://yeswellneses.shop/product-category/mens-multivitamins/