No one has a right to inject something into your body without your voluntary consent.
Your interest comes before anyone else, especially when it comes to your own body. Your interest is what you ought to bring to society. Society does not determine what your interest should be.
Liberty means being unopposed and un-interfered when it comes to specific actions. These are actions based on your requirement to live. We all need to live. The right to life is the basis of all other rights.
The right to be free from forcibly taking a particular medicine is also included in the fact that one has the freedom to take any medication that one believes in. Even if you want to inject poison, you have every right to. You have the right to flourish or even to kill yourself as long as you don’t infringe on the rights of others. We want to flourish, be happy, and be satisfied. We are attracted to the beauty and meaning in this world. We all want the liberty to create the life that we consider worth living.