Shares of Vir Biotechnology Inc.
VIR,
-8.23%

gained 3.1% in premarket trading on Friday after the company shared positive data from mid-stage and early-stage clinical trials for its experimental hepatitis C treatments. One candidate, VIR-2218, was tested subcutaneously in 32 patients with chronic hepatitis B infections. The other, VIR-3434, enrolled 40 patients in a Phase 1 clinical trial. Vir’s stock is up 85.2% so far this year, while the S&P 500
SPX,
+0.33%

has gained 13.0%.

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