DS-260 vaccinations问题请教8老师

尊敬的8老师：

父母移民，DS-260表中：

Do you have documentation to establish that you have received vaccinations in accordance with U.S. law?

我理解是体检时才会打疫苗，他们现在是没有疫苗记录的，这里是否填NO呢？谢谢！