Why does a sickle shaped red blood cell cause trouble when a normal round red blood cell doesn’t?

Sickle cell anemia is an inherited form of anemia — a condition in which there aren't enough healthy red blood cells to carry adequate oxygen throughout your body. ... These irregularly shaped cells can get stuck in small blood vessels, which can slow or block blood flow and oxygen to parts of the body

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scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's