IL10 and infection: The timing of this switch is important for balancing the response to infection and immunopathology: a series of studies from the Lenz group (Humann et al, 2007; Clark et al, 2016, 2018) and others (McCullers, 2014; Liu et al, 2019) have shown that NK cell‐derived IL‐10 makes mice more susceptible to infection if produced too early.