Patients with COVID-19 had a persistently low B cells and minimal increase in NK cell population
We furtherĀ assessed B cells, NK cells, and NKT cells in peripheral blood to better understand lymphocyte attrition. When compared to hospitalization, there was a substantial decline in B cells from one month (P=0.043) to 6-7 months (P=0.0034) (Fig 4A). The cytotoxic and regulatory fractions of NK cells increased slightly but not significantly with time compared to enrolmentĀ (Fig 4B & 4C). Despite this, no significant changes in NKT cells were observed over time (Fig 4D).