Hepatitis B is often referred to as a "silent killer" because it typically presents with few symptoms but can lead to serious complications, including death, and currently, there is no complete cure. The disease is primarily transmitted through blood, sexual contact, and from mother to child. While vaccination is an effective preventive measure, its protection is not absolute. This raises the question: can a person who has been fully vaccinated against hepatitis B still contract the disease, particularly through sexual contact?