ELISA nlm.nih.gov Elisa and Western blot tests http://www.nlm.nih.gov/medlineplus/ency/article/003538.htm http://www.nlm.nih.gov/medlineplus/ency/article/003538.htm Elisa and Western blot tests ELISA/Western blot tests for HIV http://www.nlm.nih.gov/medlineplus/ency/article/003538.htm HIV ELISA/western blot