Answer:
This is the difference between passive and active immunity
Explanation:
2nd. The placenta doesnt begin forming till the end of the first trimester.
I think it’s enzymes I hope that works
The correct answer is letter A. Pre-existing conditions are usually the exclusions of health care programs available in most societies. This is the reason why there are a lot of lawsuits filed against healthcare companies who do not fairly adhere with the interests of their clients/patients.