This episode features Natural Medicine Journal editorial board member and Covid-19 expert, Heather Zwickey, PhD. She answers our questions about mRNA technology, long-term immunity, and how to help enhance a patient's response to the vaccine. She also talks about Moderna's request to cut the dose in half and describes which patients may need to be careful regarding vaccine efficacy.  About the Expert Heather Zwickey, PhD, is a professor of immunology and chair of the Department of Health Sciences at the National University of Natural Medicine in Portland, Oregon. She launched the Helfgott Research Institute, which advances the science of natural medicine. Zwickey founded the school of graduate studies and developed masters programs in research, nutrition, and global health. Zwickey has received the Champion of Naturopathic Medicine Award from the American Association of Naturopathic Physicians. She currently leads a National Institutes of Health–funded clinical research training program focused on integrative medicine research and studies the gut-brain axis in neuroinflammation.