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Fatemeh Rostami · Answer 1 · 2021-10-07T22:32:23+0000

Answer:Vaccines are responsible for the control of many infectious diseases that were once common in this country, including polio, measles, diphtheria, pertussis (whooping cough), rubella (German measles), mumps, tetanus, and Haemophilus influenzae type b (Hib).

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Hoang Pham · Answer 2 · 2021-10-11T17:36:45+0000

Answer: Bacteria

Step-by-step explanation:

Invasive bacteria such as Salmonella , listeria,yersinia And Mycobacterium Have been used as vaccine vector

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