vaccine efficacy
Shot's success percentage
Vaccine efficacy is a measure of how well a vaccine prevents disease under ideal, controlled conditions—typically determined through clinical trials.
It's expressed as a percentage: a vaccine with 90% efficacy reduces the risk of disease by 90% compared to an unvaccinated group.
This differs from vaccine effectiveness, which measures real-world performance where factors like storage, administration, and population variation come into play.
The trial demonstrated vaccine efficacy of 95% against symptomatic infection.
- herd immunityWidespread resistance protecting all
- waningGradually decreasing in intensity
- peer reviewExpert evaluation before publication
- clinical trialsControlled health research experiments
- immune responseBody fighting foreign threats
double blind study · antibody response · disease eradication · durability · booster shots · confidence intervals · antibodies · vaccination coverage · adjuvants · immune memory · inoculation · trials · antigen · dose · rollout · shot in the arm · neutralizing · strain
- vaccinationvaccines, immunization, shot, shots, inoculation
- COVID-19COVID-19, spike protein, mRNA vaccines, omicron, variants
- vaccinesPfizer, Moderna, vaccines, AstraZeneca, vaccination
- immunityimmune, immunity, immune system, immune response, immune cells
- Polio VaccinationIPV, polio drops, Jonas Salk, vaccination campaign, mass vaccination
- biostatisticsANOVA, biostatistics, t-tests, confidence interval, p-value
vaccine efficacybreakthrough infection
Illness despite immunization
treatment failure · susceptibility · vulnerability · infection risk · side effects