The serum concentration of which of the following human IgG subclass is maximum?

Salivary peroxidise system is known to be effective agianst________?

Immunoglobulin implicated in atopy and anaphylaxis is________?

Schuffner’s dots are seen in infection due to________?

True about Toxaplasma gondi is, it is carried by________?

One virus particle prevents multiplication of 2nd virus. This phenomena is________?