Which of the following is not an autoimmune disease?
Vitiligo
Psoriasis
Alzheimer’s disease
Rheumatoid arthritis
Thymus is the site for the development and maturation of
What is the basic principle of vaccination ? How do vaccines prevent microbial infections ? Name the organism from which hepatitis $B$ Vaccine is produced.
The toxic substances produced by the foreign bodies are known as
Interferons are
$T$-cells are lymphocytes which produce the cellular immunity. These are developed from