Understanding Immunity to the Flu Vaccine in COVID-19 Patients
Understanding Immunity to the Flu Vaccine in COVID-19 Patients
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.
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