What we know and what we're still learning about COVID-19 vaccine - Saint Mary's University of Minnesota Skip to Main Content

April 14, 2021

Cardinal Update

What we know and what we’re still learning about COVID-19 vaccine

COVID-19 vaccines are new, and we’re continually learning more about the protection they offer. While the vaccines were developed quickly standard safety protocols and processes have been in place to ensure the safety of any vaccine approved for use in the United States.  The Centers for Disease Control and Prevention (CDC) offers the following summary of our current knowledge about COVID-19 vaccination.

  • We know that COVID-19 vaccines are effective at preventing COVID-19 disease, especially severe illness and death.
    • We’re still learning how effective the vaccines are against variants of the virus that causes COVID-19. Early data show the vaccines may work against some variants but could be less effective against others.
  • We know that other prevention steps help stop the spread of COVID-19, and that these steps are still important, even as vaccines are being distributed.
    • We’re still learning how well COVID-19 vaccines keep people from spreading the disease.
    • Early data show that the vaccines may help keep people from spreading COVID-19, but we are learning more as more people get vaccinated.
  • We’re still learning how long COVID-19 vaccines can protect people.
  • As we know more, CDC will continue to update our recommendations for both vaccinated and unvaccinated people.

Until we know more about those questions, everyone — even people who’ve had their vaccines — should continue taking steps to protect themselves and others when recommended.

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