A method of committing fraud by sending emails to the customers of a legitimate online business, such as a bank, that pretend to be from that business and ask for information such as account numbers or passwords. phishing.
Research the causes of these diseases that are similar to, or related to, Common Variable Immunodeficiency: 1  CVID. 2  Primary immunodeficiencies. 3  Immunoglobulin deficiency.  Immunoglobulin 1  G. 2  IgG. more related diseases...Â».
Constant and persistent respiratory infections. These are among the most common symptoms of a weak immune system. They manifest as a constant flu that in most cases is seasonal. People with impaired immunity usually have flu symptoms starting in early autumn ending in late spring.