Which of the following as signs and symptoms of diabetes mellitus Type I?

Animal transplants of organs into a human are called  

Human transplants from an identical sibling are best called

Herd immunity is achieved when a critical portion of the population is immune to disease so that the infectious agent cannot spread due to few susceptible hosts.

To minimize rejection of transplanted tissue the medical personnel must match donor and recipient and use immunosuppressive drugs.

Adjuvant refers to 

Exposure to an antigen provides 

The earliest attempt to achieve vaccination for smallpox was

The pneumococcal vaccine for adults is an example of 

Receiving an antitoxin from an injection is an example of