Essays written in an academic voice typically include

1. personal statements.
2. imprecise vocabulary.
3. strong transitions.
4. slang phrases.

3. strong transitions.

Explanation:

Essays written in an academic voice typically include strong transitions. Strong transitions allow a text to flow easily from one paragraph to the next. They also help us link ideas in a way that is logical to the reader. Finally, strong transitions make a text more coherent and cohesive, and can make it look more professional and well-thought out.

the red coloration of the lungs looks alarming and adds to the overall message that the flu is threatening apex