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AnaptysBio shares sag as Sanofi-Regeneron trial stokes IL-33 doubts

A 12% dip in AnaptysBio's share price Friday suggests investors are concerned that a Phase II readout for a rival IL-33 inhibitor could indicate that the drug class may not provide a differentiated clinical benefit in asthma compared with marketed drug Dupixent.

Sanofi (Euronext:SAN; NASDAQ:SNY) and

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