Acid pH enhances SARS-CoV-2 infection by up-regulating ACE2 receptor

A new study published in the journal Frontiers of Medicine indicated that Barrett’s esophagus (BE) and gastroesophageal reflux disease (GERD) may represent novel comorbidities associated with SARS-CoV-2 disease. A previous study had estimated that in the United States, 5.6% of adults have BE, a disease where esophageal squamous mucosa gets damaged by GERD.