Biology, asked by pahijaan, 1 year ago

why it is difficult to develop vaccines for some disease

Answers

Answered by lTheDreamCatcherl
2

The first approach utilizes a live, yet weakened strain of the disease in question. This weakened strain is not strong enough to cause illness yet potent enough to activate the immune system so that it can detect and fight a disease if it enters the body in the future.

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