[Ernest_at_the_Beach]

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Each of these patients developed a cytokine release syndrome—marked by fever, nausea, hypoxia, and low blood pressure—which doctors treated with tocilizumab.

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and

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..... as well as normal B cells used by the body's immune system to fight infection. Patients were given regular gamma globulin treatments as a preventive measure.

[Smokin' Joe]

What I am asking is: Does the Gamma Globulin treatment restore (or does the body recover) B cell production/levels, or does the change persist?