• Mayo Clinic Q&A podcast: COVID-19 vaccine confidence and the importance of that second dose

While the number of people being vaccinated for COVID-19 is dropping, the Centers for Disease Control and Prevention and other medical experts continue to strongly encourage people to get vaccinated for COVID-19. And that means that those who are being vaccinated with the Moderna and Pfizer COVID-19 vaccine should get their first and second doses on schedule.

“About 8% of people who got their first dose have not returned for the second dose and this is concerning when you're getting close to 1 in 10," says Dr. Gregory Poland, an infectious diseases expert and head of Mayo Clinic's Vaccine Research Group. "When you measure in the short term, one dose in a healthy person offers about 80% protection. But that's not 95% protection, like you get after two doses."

In this Mayo Clinic Q&A podcast, Dr. Poland expands on why people need that second COVID-19 vaccine dose and he talks about whether people should mix and match the different COVID-19 vaccines for their second dose. He also speaks about the status of COVID-19 vaccines for young people, and he addresses listener questions about traveling, being together after vaccination, and the latest rise of additional COVID-19 variants.

Watch: Dr. Poland discuss the importance of the second dose.

Read the full transcript.


For the safety of its patients, staff and visitors, Mayo Clinic has strict masking policies in place. Anyone shown without a mask was either recorded prior to COVID-19 or recorded in a nonpatient care area where social distancing and other safety protocols were followed.

Information in this post was accurate at the time of its posting. Due to the fluid nature of the COVID-19 pandemic, scientific understanding, along with guidelines and recommendations, may have changed since the original publication date

Research disclosures for Dr. Gregory Poland.

For more information and all your COVID-19 coverage, go to the Mayo Clinic News Network and mayoclinic.org.

Learn more about tracking COVID-19 and COVID-19 trends.

April 22, 2021- Mayo Clinic COVID-19 trending map using red color tones for hot spots

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