Q: Fact 1: Immunity results from immunization. Fact 2: Immunization with vaccine is effective. Given the two facts above, what can vaccines do?

Pick from: (1). cause euphoria (2). major threat to health (3). it protects them (4). protect plants (5). Keep someone from disease (6). cause a disease (7). cause a vasectomy (8). rapid expansion
The answer is:
(5).