The signature effect of HIV infection, and the cause of AIDS, is disruption of the T-lymphocyte branch of the immune system and in particular the destruction of CD4+ T-helper cells.
Eric, Erik. The given name Erika, or Erica, is a feminine form of Eric, deriving from the Old Norse name EirÃ­kr (or ErÃ­kr in Eastern Scandinavia due to monophthongization). The first element, ei- is derived either from the older Proto-NorseZ*aina(z) meaning one or some, or from Proto-Norse *aiwa(z) meaning fair or tradition.
Erica /er-i-ca/ [3 sylls.] as a girls' name is pronounced AIR-a-ka. It is of Old Norse origin, and the meaning of Erica is complete ruler . Latinate feminine form of Eric, and also a flower name, as the Latin word erica means  heather . Scandinavian name revived in the 19th century.