Medical Freedom; Citing this act as the "Medical Freedom Act"; requiring certain health care practitioners and paramedics to, before administering a vaccine to a minor child, inform the parent or legal guardian of certain information using materials approved and adopted by joint rule of the Board of Medicine and the Board of Osteopathic Medicine; providing that specified amendments made by the act to s. 456.0575, F.S., take effect within a specified timeframe after the Board of Medicine and the Board of Osteopathic Medicine adopt certain materials by joint rule; authorizing pharmacists to provide ivermectin to adults without a prescription as a behind-the-counter medication until the United States Food and Drug Administration approves it for over-the-counter sale; revising exemptions from school-entry immunization requirements, etc.