Here is the direct quote from the book, published in 2013:
"Once receptors on these cells are compromised there is enhanced vascular permeability, increased lung edema, neutrophil accumulation, and worsened lung function. In essence, once the virus begins attaching to ACE-2, ACE-2 function begins to be destroyed. ACE-2 function also tends to be less dynamic as people grow older, hence the more negative the effects of SARS infection on the elderly. [...] ACE (in contrast with ACE-2) inhibitors increase the presence of ACE-2 and help protect the lungs from injury."
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