Write a note on lymphoid organs.
Which one of the following statements is correct?
$A$ : Colostrum is a very efficient means of transferring immunity to a newborn. $R$ : IgM from mother’s milk protects the baby from the respiratory infection usually affecting in young age.
Transplantation of tissues/organs fails often due to nonacceptance by the patient’s body. Which type of immune response is responsible for such rejections?
The toxic substances produced by the foreign bodies are known as
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