* Menveo protects against a cause of meningitis * Novartis seeking approval in infants and toddlers * Menveo already approved for people 2-55 years ZURICH, June 16 (Reuters) – U.S. authorities have accepted Novartis’s application to broaden use of its meningitis vaccine Menveo, the Swiss drugmaker said on Thursday, giving its Vaccines and Diagnostics unit […]