My Patients Ask — Does the COVID vaccine protect against asymptomatic disease?

In short, a recent study of the two mRNA vaccines available in the U.S. tells us, “Yes!”

A retrospective cohort study involving 39,156 asymptomatic adults found that those who had received the two doses of the messenger-RNA-based COVID vaccines from Pfizer/BioNTech or Moderna had an 80% lower likelihood of testing positive for asymptomatic COVID compared with those who had not been vaccinated.

Even just a single dose reduced the risk for asymptomatic infection by 79%.

However, according to study author, Aaron Tande, MD, further studies are required to better understand the impact of vaccination on the virus’ spread.

The study was published in the journal Clinical Infectious Diseases and you can find the full story here.

This blog was accurate as of the day of posting. However, as the COVID-19 pandemic rapidly evolves and the scientific community’s understanding of the novel coronavirus and the COVID vaccine develops, the information above may have changed since it was last updated. While I aim to keep all of my blogs on COVID and the COVID vaccine up to date, please visit online resources provided by the CDC, WHO, and your local public health department to stay informed on the latest news.

© Copyright WLL, INC. 2021. This blog provides a wide variety of general health information only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment from your regular physician. If you are concerned about your health, take what you learn from this blog and meet with your personal doctor to discuss your concerns.


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