COVID-19-induced gastrointestinal autonomic dysfunction: A systematic review

Figure 2 Potential entry pathways of severe acute respiratory syndrome coronavirus 2 into the brainstem. This diagram illustrates the potential pathways for severe acute respiratory syndrome coronavirus 2 to enter the brainstem, including through the nasal passage and olfactory system, via the bloodstream, through the vagus nerve connecting the lungs and intestines, and through the placenta due to the virus' neurotropic properties.