The purpose of this study is to measure immunity to the flu vaccine over time in patients who had COVID-19. Adults who have been diagnosed with COVID-19 as well as controls without COVID-19 will be invited to participate in this study.
Biological: Flu shot
All participants will receive a single shot of the flu vaccine
Inclusion Criteria:
- Adults enrolled in study 55689 (NCT04373148)
- Adults diagnosed with severe or moderate COVID-19 at least 2 months prior enrollment
- Adults without COVID-19 diagnosis for healthy controls
- Healthy controls may also be recruited outside of IRB#55689
Exclusion Criteria:
- Received the influenza vaccine less than 4 months ago
- Pregnant or lactating
- Patients with special risks attendant to venipuncture
- Adults who test positive for COVID-19 (pcr test)
- Use of immunomodulatory medications
- Immunodeficiency or autoimmune disease
Stanford University, Hospital, and Clinics
Stanford, California, United States
Kari Nadeau, MD, PhD, Principal Investigator
Stanford University