Vaccines contain tiny fragments of the disease-causing organism, or the 'instructions' for making those fragments. They also contain other ingredients to maintain the safety and effectiveness of the vaccine. The latter are included in most vaccines and have been used for decades in billions of vaccine doses.
Vaccines contain tiny fragments of the disease-causing organism, or the 'instructions' for making those fragments. They also contain other ingredients to maintain the safety and effectiveness of the vaccine. The latter are included in most vaccines and have been used for decades in billions of vaccine doses.
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