An additional problem is that many adults were not immunised as children and have not caught up since.
此外,许多成年人和小孩一样并没有免疫力,且从未引起重视。
verb
1.Make (a person or animal) immune to infection, typically by inoculation.
‘the vaccine is used to immunize children against measles’
‘Three days after UV exposure, the mice were immunized by subcutaneous injection of the antigen.’
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