Viral plagues such as smallpox, polio, measles, hepatitis B, rabies, and other once-terrifying scourges have only been beaten back by vaccines.
Vaccines have been effective in fighting viral pandemics.
mnli hypothesis: Vaccines have been effective in fighting viral pandemics. premise: Viral plagues such as smallpox, polio, measles, hepatitis B, rabies, and other once-terrifying scourges have only been beaten back by vaccines.