Sanofi has moved to bolster its vaccines business by reaching a deal to buy London, UK-based biotech Vicebio, which was formed to produce improved, more potent shots that are simpler to manufacture.

No Lazy Kid: 12-year-old app developer off to fast start Ethan Duggan’s app career began with an at-home fashion show. His mother had returned home after clothes shopping and wanted to model her new ...