![Frederick G. Hayden, MD, examined the effectiveness of a new anti-flu drug, baloxavir marboxil, also known as Xofluza.](https://makingofmedicine.virginia.edu/wp-content/uploads/2018/09/Frederick_Hayden_02_DA-351x244.jpg)
The federal Food and Drug Administration has approved a new single-dose drug, baloxavir marboxil, that can shorten the duration of the flu. It's the first new drug of its type in 20 years. Our Frederick G. Hayden, MD, and his colleagues found that the drug, developed by pharma company Shinogi,…