Taiwan re-enforced the polio vaccination requirement as "travelers seeking to enter the R.O.C. (Taiwan) must submit proof of having been administered the oral polio vaccine (OPV) or inactivated polio vaccine (IPV) within the past year if they have resided in or visited countries at high risk of polio outbreaks (namely, Afghanistan, Malawi, Mozambique, Pakistan, Madagascar, Democratic Republic of the Congo, and Israel) for four weeks or longer within the past year. Such travelers must provide their International Certificates of Vaccination or Prophylaxis (Yellow Book) issued by a hospital or healthcare professional with their polio vaccinations recorded therein as proof," which applies to not only visa applicants but also visa-exempt entry eligibles.
See Remark 4 at https://www.boca.gov.tw/cp-149-4486-7785a-2.html.