Answering Questions About the mRNA Vaccine

Part 2 of 2

Welcome back for part two of our series about the mRNA vaccine. Please check our blog at if you missed the first installment in this series.

How long does the mRNA vaccine’s protection last?

Different vaccines provide protection for different durations of time. For example, tetanus shots are good for ten years and measles vaccines are good for life, but flu vaccines only provide protection for a year. The exact duration of the coronavirus vaccines is currently unknown. Researchers hope that the vaccines will provide immunity for 2-3 years. However, it is likely that annual vaccinations will be needed.

Why is a second shot necessary?

It is not uncommon for vaccines to require multiple shots. The first shot alerts your body to recognize the virus and prepares your immune system. The second shot strengthens the immune system response. Pfizer’s clinical trials demonstrated that their vaccine was 52% effective after the first shot and 95% effective after the second shot. The Pfizer/Bio-N-Tech vaccine requires a second dose 21 days after the first injection. The Moderna vaccine requires a second dose 28 days after the first injection.

If you can’t get the second shot on schedule, get it as soon as possible. If you don’t get the second shot, you may be less likely to g