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COVID-19 Study Findings Published in Journal of the American Medical Association Authored by St. Luke’s Infectious Disease Specialist Dr. Harmony Tyner

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RECOVER Study, St. Luke's

St. Luke’s Infectious Disease Specialist Dr. Harmony Tyner is the senior author of an article published recently in the Journal of the American Medical Association.

Dr. Tyner is one of the researchers of the national RECOVER COVID-19 study. One key finding highlighted in the article is that frontline workers who had two or three mRNA vaccine doses had milder cases of COVID-19 than frontline workers who were not vaccinated and got COVID. The study also found that vaccinated frontline workers who got COVID had a lower viral RNA load of the Delta and Omicron variants than unvaccinated frontline workers who got COVID. These findings will help inform public health guidance nationally.

Nearly 600 frontline workers from the Duluth area are participating in this study. Along with Dr. Tyner, Angela Hunt, Jessica Lundgren, Marilyn Odean and Karley Respet from St. Luke’s and Whiteside Institute for Clinical Research were also authors of the article.

The study also involves researchers in Arizona, Florida, Oregon, Texas and Utah. More volunteers are needed in the Duluth-Superior area for this ongoing study. If you’d like to be a part of it, email to learn more or visit

To view the article, visit: Association of mRNA Vaccination with Clinical and Virologic Features of COVID-19 Among US Essential and Frontline Workers