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Maksim231197 [3]
3 years ago
9

Most ______ immunizations must be re-administered on a regular basis.

Biology
2 answers:
Nataliya [291]3 years ago
7 0
Vaccine immunization is the correct answer I really hope that this helps and 
ankoles [38]3 years ago
7 0

Artificial, i think ‍

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