COVID-19 Updates – Vaccines vs. the Delta Variant, AZ Vaccine Updates, and Vaccines and Non-COVID Mortality

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    With SARS-CoV-2 infections on the rise again, Professor Roger Seheult, MD, breaks down the latest information on the Delta variant and how current vaccines are faring against the surge. 


    Coronavirus Vaccines vs. NON COVID-19 related deaths (New Data)

    In our 139th update, Dr. Seheult discusses lower non-COVID-related death rates in COVID-19 vaccine recipients, as described in the weekly Morbidity and Mortality Report from the CDC. Although post-vaccination deaths have been reported to the Vaccine Adverse Events System (VAERS), few studies have evaluated non-COVID-related mortality among vaccinated and unvaccinated groups. 

    This study found that COVID-19 vaccine recipients had lower rates of non-COVID-19 mortality than unvaccinated persons, and there was no increased risk for death among vaccine recipients. 

    For more information on COVID vaccines, check out our video on COVID Vaccine Myths, Questions, and Rumors with Rhonda Patrick.


    AstraZeneca Second Doses vs. Moderna and Pfizer COVID Vaccines

    In our 140th COVID-19 update video, Dr. Seheult reviews new AstraZeneca (AZ) vaccine data and compares second doses of this vaccine with Pfizer and Moderna. He reviews studies from Scotland and Sweden on the efficacy of the AZ vaccine against COVID-19 hospitalization. The immune protection obtained by combining a first dose of the AZ vaccine with a second dose of one of the MRNA vaccines versus both doses of only the AZ vaccine is also assessed. Additionally, he explains information from the European Medicines Agency on benefits and risks (such as blood clots) related to the AZ vaccine. For more information on the AstraZeneca vaccine, see our other video here.


    COVID Vaccines VS Delta Variant: State of Texas Study (Pfizer, Moderna, Johnson and Johnson)

    In our 141st COVID-19 update video, Dr. Seheult reviews the large Texas study on coronavirus infections and deaths by vaccination status.

    Dr. Seheult first provides a broad overview of the current status of COVID-19 by sharing data from Our World in Data on case and death rates in both the US and Russia. Despite similar case rate figures, Russia showed higher death rates than the US, possibly due to vaccine disparity and advancements in therapeutics available in the US. 

    He then discusses the study published by Texas DSHS which looks at COVID-19 infection and death rates in Texas for two distinct time periods: January – October 2021 and September – October 2021, when the Delta variant was at its peak. Overall findings show higher infection and death rates among unvaccinated individuals across multiple age group demographics. Dr. Seheult also stresses the importance of this study due to its use of real-world data and the benefits of vaccines against severe COVID infection and death.

    For more information on the current status of Coronavirus Cases and the Coronavirus pandemic  worldwide, see the Worldometer website.


    Stay Tuned for More COVID-19 Updates 

    Our COVID-19 videos are always available for free (and ad-free) at In addition, check out our full library of courses and lectures on subjects ranging from Sensitivity & Specificity to Mechanical Ventilation Explained Clearly and many more!

    Meanwhile, you can find all of our COVID-19 videos compiled here.


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