Sun, 03 May 2026 02:20:12 +0000

A virologist is testing a vaccines effectiveness, which reduces the infection rate from 25% to 6% in a controlled trial. If 2,000 unvaccinated individuals are exposed, how many fewer infections occur in the vaccinated group compared to the unvaccinated group?
This ongoing research has sparked widespread discussion, especially amid heightened public focus on vaccine science and infection control. With increasing interest in disease prevention and trust in scientific evidence, understanding real-world impact matters now more than ever. The trial shows a clear and dramatic drop in infection risk. In an unvaccinated group of 2,000 people exposed to the virus, infection expected at 25%—that means 500 individuals would likely contract the illness. In contrast, the vaccinated group, with infection rates reduced to 6%, experiences only about 120 infections. **How Many More Lives Does Vaccination Protect?**
Using these figures:
- Unvaccinated: 25% of 2,000 = 500 infections
- Vaccinated: 6% of 2,000 = 120 infections
- Difference: 500 – 120 = 380 fewer infections in the vaccinated group This reduction reflects real, measurable protection—less illness, fewer hospitalizations, and reduced strain on healthcare systems.