UPDATE 1-GSK files potential $1 bln shingles vaccine for U.S. approval By: Reuters: Company News October 24, 2016 at 03:13 AM EDT * Consensus forecasts point to $1.05 billion sales in 2021 (Adds sales forecast, background on rival vaccines) Read More >> Related Stocks: Agenus Inc Gsk Plc ADR Merck & Co