San Antonio Express-News: Pregnant, immunocompromised or have allergies? Here’s what you need to know about COVID-19 vaccines

Dr. Ruth Berggren, Infectious Diseases, provided an excellent interview to the San Antonio Express-News, reassuring the public about the safety of the Pfizer and Moderna vaccines and explaining the synthetic messenger, or mRNA, that directs cells to produce proteins that trigger the immune system to create antibodies.

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