1. Misinformation: The spread of false information on social media and other platforms can create doubts about vaccine safety and efficacy. 2. Fear of Side Effects: Concerns about potential side effects, even when they are rare, can deter individuals from getting vaccinated. 3. Lack of Trust: Distrust in health authorities and pharmaceutical companies can make people skeptical about the benefits of vaccines. 4. Religious Beliefs: Some people refuse vaccines due to their religious convictions. 5. Complacency: When the perceived risk of disease is low, individuals may feel that vaccination is unnecessary.