Answer:
Depends on if it is from a medical standpoint.
Step-by-step explanation:
If you are required to provide reasons why medically people should not be forced to get the vaccine then I can not help you there, but if it is just in general then that is easy. It is unethical to force people into getting a vaccine, especially with the number of different cultures and beliefs there are now. With that, you can also say it is unconstitutional because if someone's religion doesn't believe in vaccines then they are breaking the 1st amendment with freedom of religion.