Core Viewpoint - The National Health Commission of China emphasizes the importance of vaccination for adults, providing guidance on how to choose appropriate vaccines based on various factors such as age, health status, and travel plans [1][2]. Group 1: Types of Vaccines - There are several types of vaccines available for adults in China, including those for respiratory infectious diseases (influenza, pneumococcal, COVID-19, measles-mumps-rubella), intestinal infectious diseases (hepatitis A, hepatitis E, cholera), and zoonotic diseases (rabies, hemorrhagic fever, Japanese encephalitis) [1]. - Vaccines can be categorized into three main groups: 1. Vaccines recommended for all adults except those with contraindications, such as the influenza vaccine, which is advised for everyone regardless of previous vaccination history [1]. 2. Vaccines primarily recommended for specific high-risk groups, including hepatitis E for chronic liver disease patients, women of childbearing age, the elderly, students, military personnel, food service workers, livestock farmers, and travelers to endemic areas [1]. 3. Vaccines for specific situations, such as rabies vaccine after animal bites, and other vaccines based on travel requirements [2]. Group 2: Factors for Vaccine Selection - Adults should consider multiple factors when selecting vaccines, including age, health condition, occupation, travel plans, and vaccination history [2]. - It is recommended to consult local disease control centers or vaccination units for personalized advice on vaccine selection [2].