Lymphocytes secrete a protein which causes the dilation of blood vessels. The protein is
Pyrogens
Histamine
Interferon
None of the above
During an allergic reaction, the binding of antigens to IgE antibodies initiates a response, in which chemicals cause the dilation of blood vessels and a host of other physiological changes. Such chemicals are
Which one of the following statements is correct with respect to $AIDS$ ?
Smack is a drug obtained from the
The percentage of population suffering from serious mental illness is
Wuchereria bancrofti, the filarial worm that causes elephantiasis belongs to phylum