Over 190 million people have now been infected with the novel coronavirus SARS-CoV-2 in the ongoing coronavirus disease (COVID-19) pandemic with a total number of deaths passing 4.1 million worldwide. Multiple organs are affected by COVID-19, however, the lungs are the main site of disease....

Neurons communicate not only via conventional neurotransmitters but also through neuropeptides. Whereas neurotransmitters often operate by changing the excitability of neighboring neurons, neuropeptides typically impact molecular pathways within target cells leading to diverse modulatory effects. Individual neurons can release both a conventional neurotransmitter and one...