No vaccine can offer 100% protection, but the vaccines have shown to be incredibly effective in preventing people from getting seriously sick with COVID-19. Though breakthrough infections are possible (and are expected), evidence shows that fully vaccinated people with a breakthrough infection are less likely to develop serious illness than those who are unvaccinated and get COVID-19.
The more people are vaccinated, and the fewer chances for someone to be exposed to and get COVID-19, the less likely we are to see breakthrough cases. We have seen a small amount of breakthrough cases compared to the millions of people who have been vaccinated.
There is no way to know how COVID-19 will affect you personally. Though many people with COVID-19 only experience a mild illness, others may develop a severe illness, have long-term health effects, or die. Being vaccinated is the most effective way to help end the pandemic and prevent serious, tragic outcomes.
Last Reviewed: 12/14/21