. "Any process that activates or increases the frequency, rate or extent of T-helper 2 cell differentiation." . . . "positive regulation of T-helper 2 cell differentiation" . "activation of T-helper 2 cell differentiation" . "positive regulation of T-helper 2 cell development" . "stimulation of T-helper 2 cell differentiation" . "up regulation of T-helper 2 cell differentiation" . "up-regulation of T-helper 2 cell differentiation" . "upregulation of T-helper 2 cell differentiation" . . .