1. Safety: The vaccination range is wide, and the safety requirements are higher than those of commonly used drugs for acute or chronic infectious diseases for healthy people and susceptible people.
2. immunogenicity: the purpose of vaccination is to stimulate the body to produce adaptive immunity against a pathogen, which usually includes humoral immunity with B cells and cellular immunity with T cells.
3. Effectiveness: The effectiveness of a vaccine is also called protection (see the definition below). If the protective force is close to 100%, it is usually called complete protective force. If the protective power exceeds the threshold of group immunity (1-1r0), but some individuals may still be infected in the exposed environment (but the symptoms are mild), it is usually called partial protective power.