The term ‘ACE2’ is talked about in the context of

The correct option is spread of viral diseases.

What is ACE2?
ACE2 stands for Angiotensin-Converting Enzyme 2. It is an enzyme attached to the outer surfaces (cell membranes) of cells located in key organs such as the lungs, heart, kidneys, arteries, and intestines.

Role in Viral Diseases:
ACE2 gained widespread public attention during the COVID-19 pandemic because it acts as the primary cellular receptor/entry doorway for viruses like SARS-CoV-2 (the coronavirus causing COVID-19) and SARS-CoV. The spike protein on the surface of the virus binds specifically to the ACE2 receptor on human host cells, allowing the virus to enter and infect the cell.

Therefore, the term ‘ACE2’ is discussed primarily in the context of the spread of viral diseases.