Business GSK to launch late-stage testing of syncytial virus vaccine Updated : October 21, 2020 11:12 AM IST GSK said Phase III studies, with the potential to produce data for regulatory approval, would likely start over the coming months. The vaccines were well-tolerated with side effects including injection-site pain and headache, GSK added. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.