For the answer to the question above, I think that <span>the initial titer that has been done to her may have been done too early in the infection that detectable levels of antibody were not present yet so that's why they have to repeat it.</span>
<span>the study of living organisms, divided into many specialized
fields that cover their morphology, physiology, anatomy, behavior,
origin, and distribution.</span>
I believe it is earth and Mars, if I’m wrong I’m very sorry
O) Organic Matter
A) Surface soil
B) Subsoil
C) Parent Rock
R)Bed rock
