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  2. Red blood cell - Wikipedia

    en.wikipedia.org/wiki/Red_blood_cell

    Red blood cells (RBCs), referred to as erythrocytes (from Ancient Greek erythros 'red' and kytos 'hollow vessel', with -cyte translated as 'cell' in modern usage) in academia and medical publishing, also known as red cells, [1] erythroid cells, and rarely haematids, are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O 2) to the body tissues—via ...

  3. COVID-19 - Wikipedia

    en.wikipedia.org/wiki/COVID-19

    [135] [136] [137] The virus may also enter the bloodstream from the lungs and cross the blood–brain barrier to gain access to the CNS, possibly within an infected white blood cell. [134] Tropism and multiple organ injuries in SARS-CoV-2 infection. Research conducted when Alpha was the dominant variant has suggested COVID-19 may cause brain ...