Viral plagues such as smallpox, polio, measles, hepatitis B, rabies, and other once-terrifying scourges have only been beaten back by vaccines.
Vaccines have totally failed to stop viral plagues.
mnli hypothesis: Vaccines have totally failed to stop viral plagues. premise: Viral plagues such as smallpox, polio, measles, hepatitis B, rabies, and other once-terrifying scourges have only been beaten back by vaccines.