COVID-19 vaccines in 2026 remain highly effective at reducing severe illness, hospitalization, and death, especially with updated Omicron-adapted boosters. While vaccinated individuals can still experience breakthrough infections, the overall risk of serious outcomes is significantly lower compared to the unvaccinated.
How COVID-19 Vaccines Work
- Immune response: Vaccines train the immune system to recognize SARS-CoV-2 and mount a rapid defense.
- Platforms: mRNA (Pfizer, Moderna), protein-based (Novavax), and adenovirus-vectored vaccines remain widely used.
- Boosters: Updated formulations target newer variants like JN.1, improving protection against circulating strains.