After mixed success with transfusions, scientists determined that blood was different types and only certain combinations were compatible. clumping of red blood cells following transfusion is called:

 The correct answer is:

                →  " agglutination " .

Hope this answer is helpful to you!

    Wishing you the best in your academic pursuits!

answer:

there is no cure for hiv, although antiretroviral treatment can control the virus, meaning that people with hiv can live long and healthy lives. most research is looking for a functional cure where hiv is reduced to undetectable and harmless levels in the body permanently, but some residual virus may remain. most commonly hiv-antivirals are taken also known as nucleoside/nucleotide reverse transcriptase inhibitors (nrti's).