Global Adult Vaccine Market By Type (Influenza , Cervical Cancer , Zoster Shingles , Pneumococcal , Meningococcal , MMRV , Hepatitis , DTP , and Travel and Miscellaneous), By Application (Hospitals , and Medical Care Centers), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029