Assertion : Interferons are a type of'antibodies produced by body cells infected by bacteria.

Reason : Interferons stimulate inflammation at the site of injury.

Assertion : Interferons are effective against viruses.

Reason : Proteins which can be synthesized only by genetic engineering are effective against viruses.

‘Pathogens' are

Lymph glands and nodes help to

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence ?